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Finding the Fourth Proportional to 94.98, 142.29 and 86.52

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Solution

The fourth proportional to 94.98, 142.29 and 86.52 is: 129.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.98 : 142.29 = 86.52 : x
  2. Step 2: Convert to fraction form
    94.98/142.29 = 86.52/x
  3. Step 3: Cross multiply
    94.98x = 142.29 × 86.52
  4. Step 4: Simplify right side
    94.98x = 12,310.93
  5. Step 5: Solve for x
    x = 12,310.93/94.98
  6. Step 6: Final answer
    x = 129.62

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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.