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Finding the Fourth Proportional to 74.44, 102.72 and 55.04

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Solution

The fourth proportional to 74.44, 102.72 and 55.04 is: 75.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.44 : 102.72 = 55.04 : x
  2. Step 2: Convert to fraction form
    74.44/102.72 = 55.04/x
  3. Step 3: Cross multiply
    74.44x = 102.72 × 55.04
  4. Step 4: Simplify right side
    74.44x = 5,653.71
  5. Step 5: Solve for x
    x = 5,653.71/74.44
  6. Step 6: Final answer
    x = 75.95

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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.