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Finding the Fourth Proportional to 95.35, 142.75 and 61.15

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Solution

The fourth proportional to 95.35, 142.75 and 61.15 is: 91.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.35 : 142.75 = 61.15 : x
  2. Step 2: Convert to fraction form
    95.35/142.75 = 61.15/x
  3. Step 3: Cross multiply
    95.35x = 142.75 × 61.15
  4. Step 4: Simplify right side
    95.35x = 8,729.16
  5. Step 5: Solve for x
    x = 8,729.16/95.35
  6. Step 6: Final answer
    x = 91.55

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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.