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Finding the Fourth Proportional to 318,498.76, 477,764.88 and 81,843.04

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Solution

The fourth proportional to 318,498.76, 477,764.88 and 81,843.04 is: 122,768.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,498.76 : 477,764.88 = 81,843.04 : x
  2. Step 2: Convert to fraction form
    318,498.76/477,764.88 = 81,843.04/x
  3. Step 3: Cross multiply
    318,498.76x = 477,764.88 × 81,843.04
  4. Step 4: Simplify right side
    318,498.76x = 39,101,730,184.44
  5. Step 5: Solve for x
    x = 39,101,730,184.44/318,498.76
  6. Step 6: Final answer
    x = 122,768.86

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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.