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Finding the Fourth Proportional to 65.82, 98.25 and 60.15

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Solution

The fourth proportional to 65.82, 98.25 and 60.15 is: 89.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.82 : 98.25 = 60.15 : x
  2. Step 2: Convert to fraction form
    65.82/98.25 = 60.15/x
  3. Step 3: Cross multiply
    65.82x = 98.25 × 60.15
  4. Step 4: Simplify right side
    65.82x = 5,909.74
  5. Step 5: Solve for x
    x = 5,909.74/65.82
  6. Step 6: Final answer
    x = 89.79

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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.