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Finding the Fourth Proportional to 223,711.11, 308,721.38 and 123,109.11

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Solution

The fourth proportional to 223,711.11, 308,721.38 and 123,109.11 is: 169,890.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,711.11 : 308,721.38 = 123,109.11 : x
  2. Step 2: Convert to fraction form
    223,711.11/308,721.38 = 123,109.11/x
  3. Step 3: Cross multiply
    223,711.11x = 308,721.38 × 123,109.11
  4. Step 4: Simplify right side
    223,711.11x = 38,006,414,329.77
  5. Step 5: Solve for x
    x = 38,006,414,329.77/223,711.11
  6. Step 6: Final answer
    x = 169,890.60

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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.