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Finding the Fourth Proportional to 95.25, 142.64 and 74.87

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Solution

The fourth proportional to 95.25, 142.64 and 74.87 is: 112.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.25 : 142.64 = 74.87 : x
  2. Step 2: Convert to fraction form
    95.25/142.64 = 74.87/x
  3. Step 3: Cross multiply
    95.25x = 142.64 × 74.87
  4. Step 4: Simplify right side
    95.25x = 10,679.46
  5. Step 5: Solve for x
    x = 10,679.46/95.25
  6. Step 6: Final answer
    x = 112.12

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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.