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Finding the Fourth Proportional to 221,443.69, 305,609.21 and 125,944.69

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Solution

The fourth proportional to 221,443.69, 305,609.21 and 125,944.69 is: 173,813.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,443.69 : 305,609.21 = 125,944.69 : x
  2. Step 2: Convert to fraction form
    221,443.69/305,609.21 = 125,944.69/x
  3. Step 3: Cross multiply
    221,443.69x = 305,609.21 × 125,944.69
  4. Step 4: Simplify right side
    221,443.69x = 38,489,857,214.59
  5. Step 5: Solve for x
    x = 38,489,857,214.59/221,443.69
  6. Step 6: Final answer
    x = 173,813.29

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1.5x scale

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.