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Finding the Fourth Proportional to 71.08, 97.98 and 58.78

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Solution

The fourth proportional to 71.08, 97.98 and 58.78 is: 81.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.08 : 97.98 = 58.78 : x
  2. Step 2: Convert to fraction form
    71.08/97.98 = 58.78/x
  3. Step 3: Cross multiply
    71.08x = 97.98 × 58.78
  4. Step 4: Simplify right side
    71.08x = 5,759.26
  5. Step 5: Solve for x
    x = 5,759.26/71.08
  6. Step 6: Final answer
    x = 81.03

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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.