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Finding the Fourth Proportional to 95.39, 143.40 and 77.48

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Solution

The fourth proportional to 95.39, 143.40 and 77.48 is: 116.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.39 : 143.40 = 77.48 : x
  2. Step 2: Convert to fraction form
    95.39/143.40 = 77.48/x
  3. Step 3: Cross multiply
    95.39x = 143.40 × 77.48
  4. Step 4: Simplify right side
    95.39x = 11,109.53
  5. Step 5: Solve for x
    x = 11,109.53/95.39
  6. Step 6: Final answer
    x = 116.47

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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.