Home / 86,073.09-128,713.26-81,874.05

Finding the Fourth Proportional to 86,073.09, 128,713.26 and 81,874.05

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Solution

The fourth proportional to 86,073.09, 128,713.26 and 81,874.05 is: 122,434.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,073.09 : 128,713.26 = 81,874.05 : x
  2. Step 2: Convert to fraction form
    86,073.09/128,713.26 = 81,874.05/x
  3. Step 3: Cross multiply
    86,073.09x = 128,713.26 × 81,874.05
  4. Step 4: Simplify right side
    86,073.09x = 10,538,275,884.90
  5. Step 5: Solve for x
    x = 10,538,275,884.90/86,073.09
  6. Step 6: Final answer
    x = 122,434.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.