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Finding the Fourth Proportional to 223,487.09, 308,423.27 and 138,631.49

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Solution

The fourth proportional to 223,487.09, 308,423.27 and 138,631.49 is: 191,318.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,487.09 : 308,423.27 = 138,631.49 : x
  2. Step 2: Convert to fraction form
    223,487.09/308,423.27 = 138,631.49/x
  3. Step 3: Cross multiply
    223,487.09x = 308,423.27 × 138,631.49
  4. Step 4: Simplify right side
    223,487.09x = 42,757,177,470.77
  5. Step 5: Solve for x
    x = 42,757,177,470.77/223,487.09
  6. Step 6: Final answer
    x = 191,318.33

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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.