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Finding the Fourth Proportional to 71.90, 107.89 and 58.53

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Solution

The fourth proportional to 71.90, 107.89 and 58.53 is: 87.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.90 : 107.89 = 58.53 : x
  2. Step 2: Convert to fraction form
    71.90/107.89 = 58.53/x
  3. Step 3: Cross multiply
    71.90x = 107.89 × 58.53
  4. Step 4: Simplify right side
    71.90x = 6,314.80
  5. Step 5: Solve for x
    x = 6,314.80/71.90
  6. Step 6: Final answer
    x = 87.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.