Home / 135,727.43-187,320.02-78,380.73

Finding the Fourth Proportional to 135,727.43, 187,320.02 and 78,380.73

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Solution

The fourth proportional to 135,727.43, 187,320.02 and 78,380.73 is: 108,174.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,727.43 : 187,320.02 = 78,380.73 : x
  2. Step 2: Convert to fraction form
    135,727.43/187,320.02 = 78,380.73/x
  3. Step 3: Cross multiply
    135,727.43x = 187,320.02 × 78,380.73
  4. Step 4: Simplify right side
    135,727.43x = 14,682,279,519.31
  5. Step 5: Solve for x
    x = 14,682,279,519.31/135,727.43
  6. Step 6: Final answer
    x = 108,174.74

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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.