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Finding the Fourth Proportional to 66,970,992.80, 100,456,489.20 and 32,914,186.40

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Solution

The fourth proportional to 66,970,992.80, 100,456,489.20 and 32,914,186.40 is: 49,371,279.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,970,992.80 : 100,456,489.20 = 32,914,186.40 : x
  2. Step 2: Convert to fraction form
    66,970,992.80/100,456,489.20 = 32,914,186.40/x
  3. Step 3: Cross multiply
    66,970,992.80x = 100,456,489.20 × 32,914,186.40
  4. Step 4: Simplify right side
    66,970,992.80x = 3,306,443,610,618,387
  5. Step 5: Solve for x
    x = 3,306,443,610,618,387/66,970,992.80
  6. Step 6: Final answer
    x = 49,371,279.60

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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.