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Finding the Fourth Proportional to 124.50, 187.69 and 117.88

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Solution

The fourth proportional to 124.50, 187.69 and 117.88 is: 177.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.50 : 187.69 = 117.88 : x
  2. Step 2: Convert to fraction form
    124.50/187.69 = 117.88/x
  3. Step 3: Cross multiply
    124.50x = 187.69 × 117.88
  4. Step 4: Simplify right side
    124.50x = 22,124.90
  5. Step 5: Solve for x
    x = 22,124.90/124.50
  6. Step 6: Final answer
    x = 177.71

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.