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Finding the Fourth Proportional to 223,989.78, 309,105.92 and 123,387.78

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Solution

The fourth proportional to 223,989.78, 309,105.92 and 123,387.78 is: 170,275.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,989.78 : 309,105.92 = 123,387.78 : x
  2. Step 2: Convert to fraction form
    223,989.78/309,105.92 = 123,387.78/x
  3. Step 3: Cross multiply
    223,989.78x = 309,105.92 × 123,387.78
  4. Step 4: Simplify right side
    223,989.78x = 38,139,893,253.66
  5. Step 5: Solve for x
    x = 38,139,893,253.66/223,989.78
  6. Step 6: Final answer
    x = 170,275.15

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1.5x scale

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.