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Finding the Fourth Proportional to 84.33, 125.98 and 74.18

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Solution

The fourth proportional to 84.33, 125.98 and 74.18 is: 110.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.33 : 125.98 = 74.18 : x
  2. Step 2: Convert to fraction form
    84.33/125.98 = 74.18/x
  3. Step 3: Cross multiply
    84.33x = 125.98 × 74.18
  4. Step 4: Simplify right side
    84.33x = 9,345.33
  5. Step 5: Solve for x
    x = 9,345.33/84.33
  6. Step 6: Final answer
    x = 110.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.