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Finding the Fourth Proportional to 223,689.85, 308,691.98 and 123,087.85

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Solution

The fourth proportional to 223,689.85, 308,691.98 and 123,087.85 is: 169,861.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,689.85 : 308,691.98 = 123,087.85 : x
  2. Step 2: Convert to fraction form
    223,689.85/308,691.98 = 123,087.85/x
  3. Step 3: Cross multiply
    223,689.85x = 308,691.98 × 123,087.85
  4. Step 4: Simplify right side
    223,689.85x = 37,996,231,666.43
  5. Step 5: Solve for x
    x = 37,996,231,666.43/223,689.85
  6. Step 6: Final answer
    x = 169,861.23

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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.