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Finding the Fourth Proportional to 84,302.88, 126,411.84 and 28,123.52

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Solution

The fourth proportional to 84,302.88, 126,411.84 and 28,123.52 is: 42,171.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,302.88 : 126,411.84 = 28,123.52 : x
  2. Step 2: Convert to fraction form
    84,302.88/126,411.84 = 28,123.52/x
  3. Step 3: Cross multiply
    84,302.88x = 126,411.84 × 28,123.52
  4. Step 4: Simplify right side
    84,302.88x = 3,555,145,910.48
  5. Step 5: Solve for x
    x = 3,555,145,910.48/84,302.88
  6. Step 6: Final answer
    x = 42,171.11

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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.