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Finding the Fourth Proportional to 223,661.92, 308,655.86 and 121,687.96

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Solution

The fourth proportional to 223,661.92, 308,655.86 and 121,687.96 is: 167,930.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,661.92 : 308,655.86 = 121,687.96 : x
  2. Step 2: Convert to fraction form
    223,661.92/308,655.86 = 121,687.96/x
  3. Step 3: Cross multiply
    223,661.92x = 308,655.86 × 121,687.96
  4. Step 4: Simplify right side
    223,661.92x = 37,559,701,945.45
  5. Step 5: Solve for x
    x = 37,559,701,945.45/223,661.92
  6. Step 6: Final answer
    x = 167,930.70

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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.