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Finding the Fourth Proportional to 123.53, 185.43 and 117.86

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Solution

The fourth proportional to 123.53, 185.43 and 117.86 is: 176.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.53 : 185.43 = 117.86 : x
  2. Step 2: Convert to fraction form
    123.53/185.43 = 117.86/x
  3. Step 3: Cross multiply
    123.53x = 185.43 × 117.86
  4. Step 4: Simplify right side
    123.53x = 21,854.78
  5. Step 5: Solve for x
    x = 21,854.78/123.53
  6. Step 6: Final answer
    x = 176.92

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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.