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Finding the Fourth Proportional to 75.88, 113.17 and 74.92

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Solution

The fourth proportional to 75.88, 113.17 and 74.92 is: 111.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    75.88 : 113.17 = 74.92 : x
  2. Step 2: Convert to fraction form
    75.88/113.17 = 74.92/x
  3. Step 3: Cross multiply
    75.88x = 113.17 × 74.92
  4. Step 4: Simplify right side
    75.88x = 8,478.70
  5. Step 5: Solve for x
    x = 8,478.70/75.88
  6. Step 6: Final answer
    x = 111.74

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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.