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Finding the Fourth Proportional to 62.61, 85.78 and 60.31

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Solution

The fourth proportional to 62.61, 85.78 and 60.31 is: 82.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.61 : 85.78 = 60.31 : x
  2. Step 2: Convert to fraction form
    62.61/85.78 = 60.31/x
  3. Step 3: Cross multiply
    62.61x = 85.78 × 60.31
  4. Step 4: Simplify right side
    62.61x = 5,172.66
  5. Step 5: Solve for x
    x = 5,172.66/62.61
  6. Step 6: Final answer
    x = 82.62

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.