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Finding the Fourth Proportional to 124.54, 171.79 and 96.87

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Solution

The fourth proportional to 124.54, 171.79 and 96.87 is: 133.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.54 : 171.79 = 96.87 : x
  2. Step 2: Convert to fraction form
    124.54/171.79 = 96.87/x
  3. Step 3: Cross multiply
    124.54x = 171.79 × 96.87
  4. Step 4: Simplify right side
    124.54x = 16,641.30
  5. Step 5: Solve for x
    x = 16,641.30/124.54
  6. Step 6: Final answer
    x = 133.62

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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.