Home / 80,931,642.80-121,397,464.20-72,428,586.80

Finding the Fourth Proportional to 80,931,642.80, 121,397,464.20 and 72,428,586.80

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Solution

The fourth proportional to 80,931,642.80, 121,397,464.20 and 72,428,586.80 is: 108,642,880.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,931,642.80 : 121,397,464.20 = 72,428,586.80 : x
  2. Step 2: Convert to fraction form
    80,931,642.80/121,397,464.20 = 72,428,586.80/x
  3. Step 3: Cross multiply
    80,931,642.80x = 121,397,464.20 × 72,428,586.80
  4. Step 4: Simplify right side
    80,931,642.80x = 8,792,646,773,109,592
  5. Step 5: Solve for x
    x = 8,792,646,773,109,592/80,931,642.80
  6. Step 6: Final answer
    x = 108,642,880.20

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Double scale
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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.