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Finding the Fourth Proportional to 138,493.60, 207,740.40 and 45,008.80

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Solution

The fourth proportional to 138,493.60, 207,740.40 and 45,008.80 is: 67,513.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,493.60 : 207,740.40 = 45,008.80 : x
  2. Step 2: Convert to fraction form
    138,493.60/207,740.40 = 45,008.80/x
  3. Step 3: Cross multiply
    138,493.60x = 207,740.40 × 45,008.80
  4. Step 4: Simplify right side
    138,493.60x = 9,350,146,115.52
  5. Step 5: Solve for x
    x = 9,350,146,115.52/138,493.60
  6. Step 6: Final answer
    x = 67,513.20

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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.