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Finding the Fourth Proportional to 123.52, 170.52 and 99.08

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Solution

The fourth proportional to 123.52, 170.52 and 99.08 is: 136.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    123.52 : 170.52 = 99.08 : x
  2. Step 2: Convert to fraction form
    123.52/170.52 = 99.08/x
  3. Step 3: Cross multiply
    123.52x = 170.52 × 99.08
  4. Step 4: Simplify right side
    123.52x = 16,895.12
  5. Step 5: Solve for x
    x = 16,895.12/123.52
  6. Step 6: Final answer
    x = 136.78

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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.