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Finding the Fourth Proportional to 65.12, 97.22 and 60.78

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Solution

The fourth proportional to 65.12, 97.22 and 60.78 is: 90.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.12 : 97.22 = 60.78 : x
  2. Step 2: Convert to fraction form
    65.12/97.22 = 60.78/x
  3. Step 3: Cross multiply
    65.12x = 97.22 × 60.78
  4. Step 4: Simplify right side
    65.12x = 5,909.03
  5. Step 5: Solve for x
    x = 5,909.03/65.12
  6. Step 6: Final answer
    x = 90.74

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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.