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Finding the Fourth Proportional to 60.89, 84.13 and 42.56

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Solution

The fourth proportional to 60.89, 84.13 and 42.56 is: 58.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.89 : 84.13 = 42.56 : x
  2. Step 2: Convert to fraction form
    60.89/84.13 = 42.56/x
  3. Step 3: Cross multiply
    60.89x = 84.13 × 42.56
  4. Step 4: Simplify right side
    60.89x = 3,580.05
  5. Step 5: Solve for x
    x = 3,580.05/60.89
  6. Step 6: Final answer
    x = 58.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.