Home / 185,521.11-256,019.79-100,638.78

Finding the Fourth Proportional to 185,521.11, 256,019.79 and 100,638.78

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Solution

The fourth proportional to 185,521.11, 256,019.79 and 100,638.78 is: 138,881.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,521.11 : 256,019.79 = 100,638.78 : x
  2. Step 2: Convert to fraction form
    185,521.11/256,019.79 = 100,638.78/x
  3. Step 3: Cross multiply
    185,521.11x = 256,019.79 × 100,638.78
  4. Step 4: Simplify right side
    185,521.11x = 25,765,519,321.46
  5. Step 5: Solve for x
    x = 25,765,519,321.46/185,521.11
  6. Step 6: Final answer
    x = 138,881.87

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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.