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Finding the Fourth Proportional to 84,408.76, 126,613.14 and 22,078.72

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Solution

The fourth proportional to 84,408.76, 126,613.14 and 22,078.72 is: 33,118.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,408.76 : 126,613.14 = 22,078.72 : x
  2. Step 2: Convert to fraction form
    84,408.76/126,613.14 = 22,078.72/x
  3. Step 3: Cross multiply
    84,408.76x = 126,613.14 × 22,078.72
  4. Step 4: Simplify right side
    84,408.76x = 2,795,456,066.38
  5. Step 5: Solve for x
    x = 2,795,456,066.38/84,408.76
  6. Step 6: Final answer
    x = 33,118.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.