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Finding the Fourth Proportional to 136,432.80, 204,600.60 and 47,689.20

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Solution

The fourth proportional to 136,432.80, 204,600.60 and 47,689.20 is: 71,516.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,432.80 : 204,600.60 = 47,689.20 : x
  2. Step 2: Convert to fraction form
    136,432.80/204,600.60 = 47,689.20/x
  3. Step 3: Cross multiply
    136,432.80x = 204,600.60 × 47,689.20
  4. Step 4: Simplify right side
    136,432.80x = 9,757,238,933.52
  5. Step 5: Solve for x
    x = 9,757,238,933.52/136,432.80
  6. Step 6: Final answer
    x = 71,516.81

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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.