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Finding the Fourth Proportional to 60.82, 90.74 and 58.11

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Solution

The fourth proportional to 60.82, 90.74 and 58.11 is: 86.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.82 : 90.74 = 58.11 : x
  2. Step 2: Convert to fraction form
    60.82/90.74 = 58.11/x
  3. Step 3: Cross multiply
    60.82x = 90.74 × 58.11
  4. Step 4: Simplify right side
    60.82x = 5,272.90
  5. Step 5: Solve for x
    x = 5,272.90/60.82
  6. Step 6: Final answer
    x = 86.70

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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.