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Finding the Fourth Proportional to 225,965.71, 311,860.35 and 130,472.20

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Solution

The fourth proportional to 225,965.71, 311,860.35 and 130,472.20 is: 180,067.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,965.71 : 311,860.35 = 130,472.20 : x
  2. Step 2: Convert to fraction form
    225,965.71/311,860.35 = 130,472.20/x
  3. Step 3: Cross multiply
    225,965.71x = 311,860.35 × 130,472.20
  4. Step 4: Simplify right side
    225,965.71x = 40,689,105,957.27
  5. Step 5: Solve for x
    x = 40,689,105,957.27/225,965.71
  6. Step 6: Final answer
    x = 180,067.61

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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.