Home / 138,398,575.20-207,456,145.20-80,861,229.60

Finding the Fourth Proportional to 138,398,575.20, 207,456,145.20 and 80,861,229.60

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Solution

The fourth proportional to 138,398,575.20, 207,456,145.20 and 80,861,229.60 is: 121,209,043.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,398,575.20 : 207,456,145.20 = 80,861,229.60 : x
  2. Step 2: Convert to fraction form
    138,398,575.20/207,456,145.20 = 80,861,229.60/x
  3. Step 3: Cross multiply
    138,398,575.20x = 207,456,145.20 × 80,861,229.60
  4. Step 4: Simplify right side
    138,398,575.20x = 16,775,158,988,948,136
  5. Step 5: Solve for x
    x = 16,775,158,988,948,136/138,398,575.20
  6. Step 6: Final answer
    x = 121,209,043.99

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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.