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Finding the Fourth Proportional to 223,711.47, 308,721.88 and 123,109.47

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Solution

The fourth proportional to 223,711.47, 308,721.88 and 123,109.47 is: 169,891.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,711.47 : 308,721.88 = 123,109.47 : x
  2. Step 2: Convert to fraction form
    223,711.47/308,721.88 = 123,109.47/x
  3. Step 3: Cross multiply
    223,711.47x = 308,721.88 × 123,109.47
  4. Step 4: Simplify right side
    223,711.47x = 38,006,587,024.20
  5. Step 5: Solve for x
    x = 38,006,587,024.20/223,711.47
  6. Step 6: Final answer
    x = 169,891.10

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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.