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Finding the Fourth Proportional to 84.03, 115.04 and 83.74

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Solution

The fourth proportional to 84.03, 115.04 and 83.74 is: 114.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    84.03 : 115.04 = 83.74 : x
  2. Step 2: Convert to fraction form
    84.03/115.04 = 83.74/x
  3. Step 3: Cross multiply
    84.03x = 115.04 × 83.74
  4. Step 4: Simplify right side
    84.03x = 9,632.87
  5. Step 5: Solve for x
    x = 9,632.87/84.03
  6. Step 6: Final answer
    x = 114.64

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.