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Finding the Fourth Proportional to 136,472.40, 204,737.40 and 42,987.60

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Solution

The fourth proportional to 136,472.40, 204,737.40 and 42,987.60 is: 64,490.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,472.40 : 204,737.40 = 42,987.60 : x
  2. Step 2: Convert to fraction form
    136,472.40/204,737.40 = 42,987.60/x
  3. Step 3: Cross multiply
    136,472.40x = 204,737.40 × 42,987.60
  4. Step 4: Simplify right side
    136,472.40x = 8,801,169,456.24
  5. Step 5: Solve for x
    x = 8,801,169,456.24/136,472.40
  6. Step 6: Final answer
    x = 64,490.47

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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.