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Finding the Fourth Proportional to 84.16, 115.88 and 73.79

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Solution

The fourth proportional to 84.16, 115.88 and 73.79 is: 101.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.16 : 115.88 = 73.79 : x
  2. Step 2: Convert to fraction form
    84.16/115.88 = 73.79/x
  3. Step 3: Cross multiply
    84.16x = 115.88 × 73.79
  4. Step 4: Simplify right side
    84.16x = 8,549.84
  5. Step 5: Solve for x
    x = 8,549.84/84.16
  6. Step 6: Final answer
    x = 101.59

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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.