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Finding the Fourth Proportional to 84,652.35, 126,879.89 and 68,031.15

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Solution

The fourth proportional to 84,652.35, 126,879.89 and 68,031.15 is: 101,967.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,652.35 : 126,879.89 = 68,031.15 : x
  2. Step 2: Convert to fraction form
    84,652.35/126,879.89 = 68,031.15/x
  3. Step 3: Cross multiply
    84,652.35x = 126,879.89 × 68,031.15
  4. Step 4: Simplify right side
    84,652.35x = 8,631,784,488.42
  5. Step 5: Solve for x
    x = 8,631,784,488.42/84,652.35
  6. Step 6: Final answer
    x = 101,967.45

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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.