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Finding the Fourth Proportional to 60.75, 90.72 and 58.91

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Solution

The fourth proportional to 60.75, 90.72 and 58.91 is: 87.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.75 : 90.72 = 58.91 : x
  2. Step 2: Convert to fraction form
    60.75/90.72 = 58.91/x
  3. Step 3: Cross multiply
    60.75x = 90.72 × 58.91
  4. Step 4: Simplify right side
    60.75x = 5,343.86
  5. Step 5: Solve for x
    x = 5,343.86/60.75
  6. Step 6: Final answer
    x = 87.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.