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Finding the Fourth Proportional to 94.28, 130.22 and 91.07

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Solution

The fourth proportional to 94.28, 130.22 and 91.07 is: 125.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.28 : 130.22 = 91.07 : x
  2. Step 2: Convert to fraction form
    94.28/130.22 = 91.07/x
  3. Step 3: Cross multiply
    94.28x = 130.22 × 91.07
  4. Step 4: Simplify right side
    94.28x = 11,859.01
  5. Step 5: Solve for x
    x = 11,859.01/94.28
  6. Step 6: Final answer
    x = 125.79

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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.