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Finding the Fourth Proportional to 61.22, 84.86 and 60.20

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Solution

The fourth proportional to 61.22, 84.86 and 60.20 is: 83.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.22 : 84.86 = 60.20 : x
  2. Step 2: Convert to fraction form
    61.22/84.86 = 60.20/x
  3. Step 3: Cross multiply
    61.22x = 84.86 × 60.20
  4. Step 4: Simplify right side
    61.22x = 5,108.57
  5. Step 5: Solve for x
    x = 5,108.57/61.22
  6. Step 6: Final answer
    x = 83.45

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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.