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Finding the Fourth Proportional to 138,265.99, 207,399.12 and 38,426.20

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Solution

The fourth proportional to 138,265.99, 207,399.12 and 38,426.20 is: 57,639.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,265.99 : 207,399.12 = 38,426.20 : x
  2. Step 2: Convert to fraction form
    138,265.99/207,399.12 = 38,426.20/x
  3. Step 3: Cross multiply
    138,265.99x = 207,399.12 × 38,426.20
  4. Step 4: Simplify right side
    138,265.99x = 7,969,559,402.35
  5. Step 5: Solve for x
    x = 7,969,559,402.35/138,265.99
  6. Step 6: Final answer
    x = 57,639.33

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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.