Home / 185,155.70-255,515.16-100,272.75

Finding the Fourth Proportional to 185,155.70, 255,515.16 and 100,272.75

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Solution

The fourth proportional to 185,155.70, 255,515.16 and 100,272.75 is: 138,376.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,155.70 : 255,515.16 = 100,272.75 : x
  2. Step 2: Convert to fraction form
    185,155.70/255,515.16 = 100,272.75/x
  3. Step 3: Cross multiply
    185,155.70x = 255,515.16 × 100,272.75
  4. Step 4: Simplify right side
    185,155.70x = 25,621,207,759.89
  5. Step 5: Solve for x
    x = 25,621,207,759.89/185,155.70
  6. Step 6: Final answer
    x = 138,376.56

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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.