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Finding the Fourth Proportional to 225,899.92, 338,939.16 and 85,695.76

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Solution

The fourth proportional to 225,899.92, 338,939.16 and 85,695.76 is: 128,577.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,899.92 : 338,939.16 = 85,695.76 : x
  2. Step 2: Convert to fraction form
    225,899.92/338,939.16 = 85,695.76/x
  3. Step 3: Cross multiply
    225,899.92x = 338,939.16 × 85,695.76
  4. Step 4: Simplify right side
    225,899.92x = 29,045,648,909.96
  5. Step 5: Solve for x
    x = 29,045,648,909.96/225,899.92
  6. Step 6: Final answer
    x = 128,577.51

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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.