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Finding the Fourth Proportional to 318,149.19, 477,212.85 and 81,493.92

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Solution

The fourth proportional to 318,149.19, 477,212.85 and 81,493.92 is: 122,238.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,149.19 : 477,212.85 = 81,493.92 : x
  2. Step 2: Convert to fraction form
    318,149.19/477,212.85 = 81,493.92/x
  3. Step 3: Cross multiply
    318,149.19x = 477,212.85 × 81,493.92
  4. Step 4: Simplify right side
    318,149.19x = 38,889,945,820.87
  5. Step 5: Solve for x
    x = 38,889,945,820.87/318,149.19
  6. Step 6: Final answer
    x = 122,238.08

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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.