Home / 185,021.55-255,330.81-100,138.61

Finding the Fourth Proportional to 185,021.55, 255,330.81 and 100,138.61

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Solution

The fourth proportional to 185,021.55, 255,330.81 and 100,138.61 is: 138,191.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,021.55 : 255,330.81 = 100,138.61 : x
  2. Step 2: Convert to fraction form
    185,021.55/255,330.81 = 100,138.61/x
  3. Step 3: Cross multiply
    185,021.55x = 255,330.81 × 100,138.61
  4. Step 4: Simplify right side
    185,021.55x = 25,568,471,126.92
  5. Step 5: Solve for x
    x = 25,568,471,126.92/185,021.55
  6. Step 6: Final answer
    x = 138,191.85

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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.