Home / 221,664.38-305,898.78-126,177.21

Finding the Fourth Proportional to 221,664.38, 305,898.78 and 126,177.21

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Solution

The fourth proportional to 221,664.38, 305,898.78 and 126,177.21 is: 174,125.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,664.38 : 305,898.78 = 126,177.21 : x
  2. Step 2: Convert to fraction form
    221,664.38/305,898.78 = 126,177.21/x
  3. Step 3: Cross multiply
    221,664.38x = 305,898.78 × 126,177.21
  4. Step 4: Simplify right side
    221,664.38x = 38,597,454,602.80
  5. Step 5: Solve for x
    x = 38,597,454,602.80/221,664.38
  6. Step 6: Final answer
    x = 174,125.66

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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.