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Finding the Fourth Proportional to 138,609.08, 207,892.02 and 45,114.20

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Solution

The fourth proportional to 138,609.08, 207,892.02 and 45,114.20 is: 67,664.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,609.08 : 207,892.02 = 45,114.20 : x
  2. Step 2: Convert to fraction form
    138,609.08/207,892.02 = 45,114.20/x
  3. Step 3: Cross multiply
    138,609.08x = 207,892.02 × 45,114.20
  4. Step 4: Simplify right side
    138,609.08x = 9,378,882,168.68
  5. Step 5: Solve for x
    x = 9,378,882,168.68/138,609.08
  6. Step 6: Final answer
    x = 67,664.27

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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.