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Finding the Fourth Proportional to 94.24, 130.87 and 91.66

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Solution

The fourth proportional to 94.24, 130.87 and 91.66 is: 127.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.24 : 130.87 = 91.66 : x
  2. Step 2: Convert to fraction form
    94.24/130.87 = 91.66/x
  3. Step 3: Cross multiply
    94.24x = 130.87 × 91.66
  4. Step 4: Simplify right side
    94.24x = 11,995.54
  5. Step 5: Solve for x
    x = 11,995.54/94.24
  6. Step 6: Final answer
    x = 127.29

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.