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Finding the Fourth Proportional to 52.12, 71.87 and 39.04

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Solution

The fourth proportional to 52.12, 71.87 and 39.04 is: 53.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.12 : 71.87 = 39.04 : x
  2. Step 2: Convert to fraction form
    52.12/71.87 = 39.04/x
  3. Step 3: Cross multiply
    52.12x = 71.87 × 39.04
  4. Step 4: Simplify right side
    52.12x = 2,805.45
  5. Step 5: Solve for x
    x = 2,805.45/52.12
  6. Step 6: Final answer
    x = 53.83

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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.