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Finding the Fourth Proportional to 97.75, 135.21 and 93.43

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Solution

The fourth proportional to 97.75, 135.21 and 93.43 is: 129.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.75 : 135.21 = 93.43 : x
  2. Step 2: Convert to fraction form
    97.75/135.21 = 93.43/x
  3. Step 3: Cross multiply
    97.75x = 135.21 × 93.43
  4. Step 4: Simplify right side
    97.75x = 12,632.67
  5. Step 5: Solve for x
    x = 12,632.67/97.75
  6. Step 6: Final answer
    x = 129.23

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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.