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Finding the Fourth Proportional to 74.18, 102.33 and 53.52

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Solution

The fourth proportional to 74.18, 102.33 and 53.52 is: 73.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    74.18 : 102.33 = 53.52 : x
  2. Step 2: Convert to fraction form
    74.18/102.33 = 53.52/x
  3. Step 3: Cross multiply
    74.18x = 102.33 × 53.52
  4. Step 4: Simplify right side
    74.18x = 5,476.70
  5. Step 5: Solve for x
    x = 5,476.70/74.18
  6. Step 6: Final answer
    x = 73.83

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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.