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Finding the Fourth Proportional to 316,801.72, 475,157.92 and 80,129.80

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Solution

The fourth proportional to 316,801.72, 475,157.92 and 80,129.80 is: 120,183.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,801.72 : 475,157.92 = 80,129.80 : x
  2. Step 2: Convert to fraction form
    316,801.72/475,157.92 = 80,129.80/x
  3. Step 3: Cross multiply
    316,801.72x = 475,157.92 × 80,129.80
  4. Step 4: Simplify right side
    316,801.72x = 38,074,309,098.02
  5. Step 5: Solve for x
    x = 38,074,309,098.02/316,801.72
  6. Step 6: Final answer
    x = 120,183.40

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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.