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Finding the Fourth Proportional to 221,323.92, 305,406.40 and 125,811.92

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Solution

The fourth proportional to 221,323.92, 305,406.40 and 125,811.92 is: 173,608.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,323.92 : 305,406.40 = 125,811.92 : x
  2. Step 2: Convert to fraction form
    221,323.92/305,406.40 = 125,811.92/x
  3. Step 3: Cross multiply
    221,323.92x = 305,406.40 × 125,811.92
  4. Step 4: Simplify right side
    221,323.92x = 38,423,765,564.29
  5. Step 5: Solve for x
    x = 38,423,765,564.29/221,323.92
  6. Step 6: Final answer
    x = 173,608.73

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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.