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Finding the Fourth Proportional to 62.83, 87.16 and 61.35

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Solution

The fourth proportional to 62.83, 87.16 and 61.35 is: 85.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.83 : 87.16 = 61.35 : x
  2. Step 2: Convert to fraction form
    62.83/87.16 = 61.35/x
  3. Step 3: Cross multiply
    62.83x = 87.16 × 61.35
  4. Step 4: Simplify right side
    62.83x = 5,347.27
  5. Step 5: Solve for x
    x = 5,347.27/62.83
  6. Step 6: Final answer
    x = 85.11

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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.