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Finding the Fourth Proportional to 91.62, 126.30 and 58.86

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Solution

The fourth proportional to 91.62, 126.30 and 58.86 is: 81.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.62 : 126.30 = 58.86 : x
  2. Step 2: Convert to fraction form
    91.62/126.30 = 58.86/x
  3. Step 3: Cross multiply
    91.62x = 126.30 × 58.86
  4. Step 4: Simplify right side
    91.62x = 7,434.02
  5. Step 5: Solve for x
    x = 7,434.02/91.62
  6. Step 6: Final answer
    x = 81.14

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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.