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Finding the Fourth Proportional to 61.98, 85.15 and 60.36

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Solution

The fourth proportional to 61.98, 85.15 and 60.36 is: 82.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.98 : 85.15 = 60.36 : x
  2. Step 2: Convert to fraction form
    61.98/85.15 = 60.36/x
  3. Step 3: Cross multiply
    61.98x = 85.15 × 60.36
  4. Step 4: Simplify right side
    61.98x = 5,139.65
  5. Step 5: Solve for x
    x = 5,139.65/61.98
  6. Step 6: Final answer
    x = 82.92

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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.