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Finding the Fourth Proportional to 223,358.11, 308,235.45 and 121,384.42

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Solution

The fourth proportional to 223,358.11, 308,235.45 and 121,384.42 is: 167,511.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,358.11 : 308,235.45 = 121,384.42 : x
  2. Step 2: Convert to fraction form
    223,358.11/308,235.45 = 121,384.42/x
  3. Step 3: Cross multiply
    223,358.11x = 308,235.45 × 121,384.42
  4. Step 4: Simplify right side
    223,358.11x = 37,414,981,321.69
  5. Step 5: Solve for x
    x = 37,414,981,321.69/223,358.11
  6. Step 6: Final answer
    x = 167,511.18

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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.