Home / 87,311.06-130,143.51-82,878.74

Finding the Fourth Proportional to 87,311.06, 130,143.51 and 82,878.74

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Solution

The fourth proportional to 87,311.06, 130,143.51 and 82,878.74 is: 123,536.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,311.06 : 130,143.51 = 82,878.74 : x
  2. Step 2: Convert to fraction form
    87,311.06/130,143.51 = 82,878.74/x
  3. Step 3: Cross multiply
    87,311.06x = 130,143.51 × 82,878.74
  4. Step 4: Simplify right side
    87,311.06x = 10,786,129,713.58
  5. Step 5: Solve for x
    x = 10,786,129,713.58/87,311.06
  6. Step 6: Final answer
    x = 123,536.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.