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Finding the Fourth Proportional to 61.61, 91.76 and 60.27

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Solution

The fourth proportional to 61.61, 91.76 and 60.27 is: 89.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.61 : 91.76 = 60.27 : x
  2. Step 2: Convert to fraction form
    61.61/91.76 = 60.27/x
  3. Step 3: Cross multiply
    61.61x = 91.76 × 60.27
  4. Step 4: Simplify right side
    61.61x = 5,530.53
  5. Step 5: Solve for x
    x = 5,530.53/61.61
  6. Step 6: Final answer
    x = 89.77

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.