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Finding the Fourth Proportional to 95.13, 130.92 and 85.41

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Solution

The fourth proportional to 95.13, 130.92 and 85.41 is: 117.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.13 : 130.92 = 85.41 : x
  2. Step 2: Convert to fraction form
    95.13/130.92 = 85.41/x
  3. Step 3: Cross multiply
    95.13x = 130.92 × 85.41
  4. Step 4: Simplify right side
    95.13x = 11,181.88
  5. Step 5: Solve for x
    x = 11,181.88/95.13
  6. Step 6: Final answer
    x = 117.54

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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.