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Finding the Fourth Proportional to 95.64, 143.40 and 71.25

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Solution

The fourth proportional to 95.64, 143.40 and 71.25 is: 106.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.64 : 143.40 = 71.25 : x
  2. Step 2: Convert to fraction form
    95.64/143.40 = 71.25/x
  3. Step 3: Cross multiply
    95.64x = 143.40 × 71.25
  4. Step 4: Simplify right side
    95.64x = 10,217.25
  5. Step 5: Solve for x
    x = 10,217.25/95.64
  6. Step 6: Final answer
    x = 106.83

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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.