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Finding the Fourth Proportional to 138,767.20, 208,150.80 and 75,562.90

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Solution

The fourth proportional to 138,767.20, 208,150.80 and 75,562.90 is: 113,344.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,767.20 : 208,150.80 = 75,562.90 : x
  2. Step 2: Convert to fraction form
    138,767.20/208,150.80 = 75,562.90/x
  3. Step 3: Cross multiply
    138,767.20x = 208,150.80 × 75,562.90
  4. Step 4: Simplify right side
    138,767.20x = 15,728,478,085.32
  5. Step 5: Solve for x
    x = 15,728,478,085.32/138,767.20
  6. Step 6: Final answer
    x = 113,344.35

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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.