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Finding the Fourth Proportional to 121,339.56, 181,843.38 and 76,997.46

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Solution

The fourth proportional to 121,339.56, 181,843.38 and 76,997.46 is: 115,390.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,339.56 : 181,843.38 = 76,997.46 : x
  2. Step 2: Convert to fraction form
    121,339.56/181,843.38 = 76,997.46/x
  3. Step 3: Cross multiply
    121,339.56x = 181,843.38 × 76,997.46
  4. Step 4: Simplify right side
    121,339.56x = 14,001,478,377.81
  5. Step 5: Solve for x
    x = 14,001,478,377.81/121,339.56
  6. Step 6: Final answer
    x = 115,390.88

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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.