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Finding the Fourth Proportional to 61.91, 92.65 and 52.29

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Solution

The fourth proportional to 61.91, 92.65 and 52.29 is: 78.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.91 : 92.65 = 52.29 : x
  2. Step 2: Convert to fraction form
    61.91/92.65 = 52.29/x
  3. Step 3: Cross multiply
    61.91x = 92.65 × 52.29
  4. Step 4: Simplify right side
    61.91x = 4,844.67
  5. Step 5: Solve for x
    x = 4,844.67/61.91
  6. Step 6: Final answer
    x = 78.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.