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Finding the Fourth Proportional to 61.62, 85.64 and 60.96

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Solution

The fourth proportional to 61.62, 85.64 and 60.96 is: 84.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.62 : 85.64 = 60.96 : x
  2. Step 2: Convert to fraction form
    61.62/85.64 = 60.96/x
  3. Step 3: Cross multiply
    61.62x = 85.64 × 60.96
  4. Step 4: Simplify right side
    61.62x = 5,220.31
  5. Step 5: Solve for x
    x = 5,220.31/61.62
  6. Step 6: Final answer
    x = 84.72

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.