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Finding the Fourth Proportional to 74.28, 110.95 and 67.04

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Solution

The fourth proportional to 74.28, 110.95 and 67.04 is: 100.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.28 : 110.95 = 67.04 : x
  2. Step 2: Convert to fraction form
    74.28/110.95 = 67.04/x
  3. Step 3: Cross multiply
    74.28x = 110.95 × 67.04
  4. Step 4: Simplify right side
    74.28x = 7,437.75
  5. Step 5: Solve for x
    x = 7,437.75/74.28
  6. Step 6: Final answer
    x = 100.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.