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Finding the Fourth Proportional to 100,672.40, 151,105.80 and 61,306.40

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Solution

The fourth proportional to 100,672.40, 151,105.80 and 61,306.40 is: 92,018.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,672.40 : 151,105.80 = 61,306.40 : x
  2. Step 2: Convert to fraction form
    100,672.40/151,105.80 = 61,306.40/x
  3. Step 3: Cross multiply
    100,672.40x = 151,105.80 × 61,306.40
  4. Step 4: Simplify right side
    100,672.40x = 9,263,752,617.12
  5. Step 5: Solve for x
    x = 9,263,752,617.12/100,672.40
  6. Step 6: Final answer
    x = 92,018.79

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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.