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Finding the Fourth Proportional to 113.93, 171.07 and 91.04

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Solution

The fourth proportional to 113.93, 171.07 and 91.04 is: 136.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    113.93 : 171.07 = 91.04 : x
  2. Step 2: Convert to fraction form
    113.93/171.07 = 91.04/x
  3. Step 3: Cross multiply
    113.93x = 171.07 × 91.04
  4. Step 4: Simplify right side
    113.93x = 15,573.67
  5. Step 5: Solve for x
    x = 15,573.67/113.93
  6. Step 6: Final answer
    x = 136.69

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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.