Home / 80,929,188.80-121,393,783.20-72,426,132.80

Finding the Fourth Proportional to 80,929,188.80, 121,393,783.20 and 72,426,132.80

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Solution

The fourth proportional to 80,929,188.80, 121,393,783.20 and 72,426,132.80 is: 108,639,199.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,929,188.80 : 121,393,783.20 = 72,426,132.80 : x
  2. Step 2: Convert to fraction form
    80,929,188.80/121,393,783.20 = 72,426,132.80/x
  3. Step 3: Cross multiply
    80,929,188.80x = 121,393,783.20 × 72,426,132.80
  4. Step 4: Simplify right side
    80,929,188.80x = 8,792,082,263,137,609
  5. Step 5: Solve for x
    x = 8,792,082,263,137,609/80,929,188.80
  6. Step 6: Final answer
    x = 108,639,199.20

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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.