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Finding the Fourth Proportional to 95.40, 131.55 and 93.17

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Solution

The fourth proportional to 95.40, 131.55 and 93.17 is: 128.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.40 : 131.55 = 93.17 : x
  2. Step 2: Convert to fraction form
    95.40/131.55 = 93.17/x
  3. Step 3: Cross multiply
    95.40x = 131.55 × 93.17
  4. Step 4: Simplify right side
    95.40x = 12,255.86
  5. Step 5: Solve for x
    x = 12,255.86/95.40
  6. Step 6: Final answer
    x = 128.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.