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Finding the Fourth Proportional to 94.53, 130.28 and 74.79

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Solution

The fourth proportional to 94.53, 130.28 and 74.79 is: 103.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.53 : 130.28 = 74.79 : x
  2. Step 2: Convert to fraction form
    94.53/130.28 = 74.79/x
  3. Step 3: Cross multiply
    94.53x = 130.28 × 74.79
  4. Step 4: Simplify right side
    94.53x = 9,743.83
  5. Step 5: Solve for x
    x = 9,743.83/94.53
  6. Step 6: Final answer
    x = 103.08

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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.