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Finding the Fourth Proportional to 318,487.78, 477,805.50 and 108,125.72

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Solution

The fourth proportional to 318,487.78, 477,805.50 and 108,125.72 is: 162,213.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,487.78 : 477,805.50 = 108,125.72 : x
  2. Step 2: Convert to fraction form
    318,487.78/477,805.50 = 108,125.72/x
  3. Step 3: Cross multiply
    318,487.78x = 477,805.50 × 108,125.72
  4. Step 4: Simplify right side
    318,487.78x = 51,663,063,110.20
  5. Step 5: Solve for x
    x = 51,663,063,110.20/318,487.78
  6. Step 6: Final answer
    x = 162,213.64

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1.5x scale

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.