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Finding the Fourth Proportional to 74.27, 111.32 and 58.78

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Solution

The fourth proportional to 74.27, 111.32 and 58.78 is: 88.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.27 : 111.32 = 58.78 : x
  2. Step 2: Convert to fraction form
    74.27/111.32 = 58.78/x
  3. Step 3: Cross multiply
    74.27x = 111.32 × 58.78
  4. Step 4: Simplify right side
    74.27x = 6,543.16
  5. Step 5: Solve for x
    x = 6,543.16/74.27
  6. Step 6: Final answer
    x = 88.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.