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Finding the Fourth Proportional to 122.91, 185.08 and 88.91

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Solution

The fourth proportional to 122.91, 185.08 and 88.91 is: 133.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    122.91 : 185.08 = 88.91 : x
  2. Step 2: Convert to fraction form
    122.91/185.08 = 88.91/x
  3. Step 3: Cross multiply
    122.91x = 185.08 × 88.91
  4. Step 4: Simplify right side
    122.91x = 16,455.46
  5. Step 5: Solve for x
    x = 16,455.46/122.91
  6. Step 6: Final answer
    x = 133.88

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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.