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Finding the Fourth Proportional to 65.96, 99.43 and 61.55

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Solution

The fourth proportional to 65.96, 99.43 and 61.55 is: 92.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.96 : 99.43 = 61.55 : x
  2. Step 2: Convert to fraction form
    65.96/99.43 = 61.55/x
  3. Step 3: Cross multiply
    65.96x = 99.43 × 61.55
  4. Step 4: Simplify right side
    65.96x = 6,120.01
  5. Step 5: Solve for x
    x = 6,120.01/65.96
  6. Step 6: Final answer
    x = 92.79

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.