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Finding the Fourth Proportional to 95.43, 143.06 and 71.31

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Solution

The fourth proportional to 95.43, 143.06 and 71.31 is: 106.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.43 : 143.06 = 71.31 : x
  2. Step 2: Convert to fraction form
    95.43/143.06 = 71.31/x
  3. Step 3: Cross multiply
    95.43x = 143.06 × 71.31
  4. Step 4: Simplify right side
    95.43x = 10,201.25
  5. Step 5: Solve for x
    x = 10,201.25/95.43
  6. Step 6: Final answer
    x = 106.90

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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.