Home / 138,399,145.20-207,457,000.20-80,861,799.60

Finding the Fourth Proportional to 138,399,145.20, 207,457,000.20 and 80,861,799.60

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Solution

The fourth proportional to 138,399,145.20, 207,457,000.20 and 80,861,799.60 is: 121,209,898.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,399,145.20 : 207,457,000.20 = 80,861,799.60 : x
  2. Step 2: Convert to fraction form
    138,399,145.20/207,457,000.20 = 80,861,799.60/x
  3. Step 3: Cross multiply
    138,399,145.20x = 207,457,000.20 × 80,861,799.60
  4. Step 4: Simplify right side
    138,399,145.20x = 16,775,346,375,789,558
  5. Step 5: Solve for x
    x = 16,775,346,375,789,558/138,399,145.20
  6. Step 6: Final answer
    x = 121,209,898.74

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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.