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Finding the Fourth Proportional to 95.68, 142.76 and 90.82

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Solution

The fourth proportional to 95.68, 142.76 and 90.82 is: 135.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.68 : 142.76 = 90.82 : x
  2. Step 2: Convert to fraction form
    95.68/142.76 = 90.82/x
  3. Step 3: Cross multiply
    95.68x = 142.76 × 90.82
  4. Step 4: Simplify right side
    95.68x = 12,965.87
  5. Step 5: Solve for x
    x = 12,965.87/95.68
  6. Step 6: Final answer
    x = 135.51

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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.