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Finding the Fourth Proportional to 136,575.52, 204,869.80 and 66,371.20

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Solution

The fourth proportional to 136,575.52, 204,869.80 and 66,371.20 is: 99,559.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,575.52 : 204,869.80 = 66,371.20 : x
  2. Step 2: Convert to fraction form
    136,575.52/204,869.80 = 66,371.20/x
  3. Step 3: Cross multiply
    136,575.52x = 204,869.80 × 66,371.20
  4. Step 4: Simplify right side
    136,575.52x = 13,597,454,469.76
  5. Step 5: Solve for x
    x = 13,597,454,469.76/136,575.52
  6. Step 6: Final answer
    x = 99,559.97

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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.