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Finding the Fourth Proportional to 91.60, 126.33 and 58.85

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Solution

The fourth proportional to 91.60, 126.33 and 58.85 is: 81.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.60 : 126.33 = 58.85 : x
  2. Step 2: Convert to fraction form
    91.60/126.33 = 58.85/x
  3. Step 3: Cross multiply
    91.60x = 126.33 × 58.85
  4. Step 4: Simplify right side
    91.60x = 7,434.52
  5. Step 5: Solve for x
    x = 7,434.52/91.60
  6. Step 6: Final answer
    x = 81.17

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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.