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Finding the Fourth Proportional to 209,761.30, 289,356.87 and 124,861.96

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Solution

The fourth proportional to 209,761.30, 289,356.87 and 124,861.96 is: 172,241.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,761.30 : 289,356.87 = 124,861.96 : x
  2. Step 2: Convert to fraction form
    209,761.30/289,356.87 = 124,861.96/x
  3. Step 3: Cross multiply
    209,761.30x = 289,356.87 × 124,861.96
  4. Step 4: Simplify right side
    209,761.30x = 36,129,665,927.67
  5. Step 5: Solve for x
    x = 36,129,665,927.67/209,761.30
  6. Step 6: Final answer
    x = 172,241.81

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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.