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Finding the Fourth Proportional to 61.27, 91.43 and 56.83

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Solution

The fourth proportional to 61.27, 91.43 and 56.83 is: 84.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.27 : 91.43 = 56.83 : x
  2. Step 2: Convert to fraction form
    61.27/91.43 = 56.83/x
  3. Step 3: Cross multiply
    61.27x = 91.43 × 56.83
  4. Step 4: Simplify right side
    61.27x = 5,195.97
  5. Step 5: Solve for x
    x = 5,195.97/61.27
  6. Step 6: Final answer
    x = 84.80

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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.