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Finding the Fourth Proportional to 100,013.60, 138,016.68 and 54,691.07

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Solution

The fourth proportional to 100,013.60, 138,016.68 and 54,691.07 is: 75,472.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,013.60 : 138,016.68 = 54,691.07 : x
  2. Step 2: Convert to fraction form
    100,013.60/138,016.68 = 54,691.07/x
  3. Step 3: Cross multiply
    100,013.60x = 138,016.68 × 54,691.07
  4. Step 4: Simplify right side
    100,013.60x = 7,548,279,216.96
  5. Step 5: Solve for x
    x = 7,548,279,216.96/100,013.60
  6. Step 6: Final answer
    x = 75,472.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.