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Finding the Fourth Proportional to 121,176.31, 181,771.25 and 36,939.21

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Solution

The fourth proportional to 121,176.31, 181,771.25 and 36,939.21 is: 55,410.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,176.31 : 181,771.25 = 36,939.21 : x
  2. Step 2: Convert to fraction form
    121,176.31/181,771.25 = 36,939.21/x
  3. Step 3: Cross multiply
    121,176.31x = 181,771.25 × 36,939.21
  4. Step 4: Simplify right side
    121,176.31x = 6,714,486,375.71
  5. Step 5: Solve for x
    x = 6,714,486,375.71/121,176.31
  6. Step 6: Final answer
    x = 55,410.88

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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.