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Finding the Fourth Proportional to 250,398.96, 345,559.41 and 137,221.71

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Solution

The fourth proportional to 250,398.96, 345,559.41 and 137,221.71 is: 189,370.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,398.96 : 345,559.41 = 137,221.71 : x
  2. Step 2: Convert to fraction form
    250,398.96/345,559.41 = 137,221.71/x
  3. Step 3: Cross multiply
    250,398.96x = 345,559.41 × 137,221.71
  4. Step 4: Simplify right side
    250,398.96x = 47,418,253,146.79
  5. Step 5: Solve for x
    x = 47,418,253,146.79/250,398.96
  6. Step 6: Final answer
    x = 189,370.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.