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Finding the Fourth Proportional to 87.93, 121.25 and 70.44

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Solution

The fourth proportional to 87.93, 121.25 and 70.44 is: 97.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    87.93 : 121.25 = 70.44 : x
  2. Step 2: Convert to fraction form
    87.93/121.25 = 70.44/x
  3. Step 3: Cross multiply
    87.93x = 121.25 × 70.44
  4. Step 4: Simplify right side
    87.93x = 8,540.50
  5. Step 5: Solve for x
    x = 8,540.50/87.93
  6. Step 6: Final answer
    x = 97.13

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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.