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Finding the Fourth Proportional to 225,687.04, 338,486.64 and 85,456.64

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Solution

The fourth proportional to 225,687.04, 338,486.64 and 85,456.64 is: 128,168.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,687.04 : 338,486.64 = 85,456.64 : x
  2. Step 2: Convert to fraction form
    225,687.04/338,486.64 = 85,456.64/x
  3. Step 3: Cross multiply
    225,687.04x = 338,486.64 × 85,456.64
  4. Step 4: Simplify right side
    225,687.04x = 28,925,930,939.29
  5. Step 5: Solve for x
    x = 28,925,930,939.29/225,687.04
  6. Step 6: Final answer
    x = 128,168.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.