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Finding the Fourth Proportional to 71.06, 97.91 and 60.65

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Solution

The fourth proportional to 71.06, 97.91 and 60.65 is: 83.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.06 : 97.91 = 60.65 : x
  2. Step 2: Convert to fraction form
    71.06/97.91 = 60.65/x
  3. Step 3: Cross multiply
    71.06x = 97.91 × 60.65
  4. Step 4: Simplify right side
    71.06x = 5,937.45
  5. Step 5: Solve for x
    x = 5,937.45/71.06
  6. Step 6: Final answer
    x = 83.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.