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Finding the Fourth Proportional to 136,654.88, 188,671.46 and 85,737.36

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Solution

The fourth proportional to 136,654.88, 188,671.46 and 85,737.36 is: 118,372.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,654.88 : 188,671.46 = 85,737.36 : x
  2. Step 2: Convert to fraction form
    136,654.88/188,671.46 = 85,737.36/x
  3. Step 3: Cross multiply
    136,654.88x = 188,671.46 × 85,737.36
  4. Step 4: Simplify right side
    136,654.88x = 16,176,192,887.75
  5. Step 5: Solve for x
    x = 16,176,192,887.75/136,654.88
  6. Step 6: Final answer
    x = 118,372.60

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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.