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Finding the Fourth Proportional to 221,654.71, 305,866.15 and 124,854.33

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Solution

The fourth proportional to 221,654.71, 305,866.15 and 124,854.33 is: 172,289.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,654.71 : 305,866.15 = 124,854.33 : x
  2. Step 2: Convert to fraction form
    221,654.71/305,866.15 = 124,854.33/x
  3. Step 3: Cross multiply
    221,654.71x = 305,866.15 × 124,854.33
  4. Step 4: Simplify right side
    221,654.71x = 38,188,713,227.93
  5. Step 5: Solve for x
    x = 38,188,713,227.93/221,654.71
  6. Step 6: Final answer
    x = 172,289.21

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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.