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Finding the Fourth Proportional to 91.61, 126.42 and 52.27

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Solution

The fourth proportional to 91.61, 126.42 and 52.27 is: 72.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91.61 : 126.42 = 52.27 : x
  2. Step 2: Convert to fraction form
    91.61/126.42 = 52.27/x
  3. Step 3: Cross multiply
    91.61x = 126.42 × 52.27
  4. Step 4: Simplify right side
    91.61x = 6,607.97
  5. Step 5: Solve for x
    x = 6,607.97/91.61
  6. Step 6: Final answer
    x = 72.13

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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.