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Finding the Fourth Proportional to 318,679.18, 477,668.85 and 108,158.56

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Solution

The fourth proportional to 318,679.18, 477,668.85 and 108,158.56 is: 162,119.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,679.18 : 477,668.85 = 108,158.56 : x
  2. Step 2: Convert to fraction form
    318,679.18/477,668.85 = 108,158.56/x
  3. Step 3: Cross multiply
    318,679.18x = 477,668.85 × 108,158.56
  4. Step 4: Simplify right side
    318,679.18x = 51,663,974,972.86
  5. Step 5: Solve for x
    x = 51,663,974,972.86/318,679.18
  6. Step 6: Final answer
    x = 162,119.08

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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.