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Finding the Fourth Proportional to 223,417.89, 308,318.49 and 121,443.30

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Solution

The fourth proportional to 223,417.89, 308,318.49 and 121,443.30 is: 167,592.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,417.89 : 308,318.49 = 121,443.30 : x
  2. Step 2: Convert to fraction form
    223,417.89/308,318.49 = 121,443.30/x
  3. Step 3: Cross multiply
    223,417.89x = 308,318.49 × 121,443.30
  4. Step 4: Simplify right side
    223,417.89x = 37,443,214,876.62
  5. Step 5: Solve for x
    x = 37,443,214,876.62/223,417.89
  6. Step 6: Final answer
    x = 167,592.73

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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.