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Finding the Fourth Proportional to 61.57, 85.41 and 60.05

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Solution

The fourth proportional to 61.57, 85.41 and 60.05 is: 83.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    61.57 : 85.41 = 60.05 : x
  2. Step 2: Convert to fraction form
    61.57/85.41 = 60.05/x
  3. Step 3: Cross multiply
    61.57x = 85.41 × 60.05
  4. Step 4: Simplify right side
    61.57x = 5,129.13
  5. Step 5: Solve for x
    x = 5,129.13/61.57
  6. Step 6: Final answer
    x = 83.30

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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.