Home / 80,929,206.30-121,393,809.45-72,426,150.30

Finding the Fourth Proportional to 80,929,206.30, 121,393,809.45 and 72,426,150.30

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Solution

The fourth proportional to 80,929,206.30, 121,393,809.45 and 72,426,150.30 is: 108,639,225.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,929,206.30 : 121,393,809.45 = 72,426,150.30 : x
  2. Step 2: Convert to fraction form
    80,929,206.30/121,393,809.45 = 72,426,150.30/x
  3. Step 3: Cross multiply
    80,929,206.30x = 121,393,809.45 × 72,426,150.30
  4. Step 4: Simplify right side
    80,929,206.30x = 8,792,086,288,715,260
  5. Step 5: Solve for x
    x = 8,792,086,288,715,260/80,929,206.30
  6. Step 6: Final answer
    x = 108,639,225.45

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.