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Finding the Fourth Proportional to 65.32, 97.81 and 61.30

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Solution

The fourth proportional to 65.32, 97.81 and 61.30 is: 91.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.32 : 97.81 = 61.30 : x
  2. Step 2: Convert to fraction form
    65.32/97.81 = 61.30/x
  3. Step 3: Cross multiply
    65.32x = 97.81 × 61.30
  4. Step 4: Simplify right side
    65.32x = 5,995.72
  5. Step 5: Solve for x
    x = 5,995.72/65.32
  6. Step 6: Final answer
    x = 91.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.