Home / 86,874.06-130,962.09-81,087.39

Finding the Fourth Proportional to 86,874.06, 130,962.09 and 81,087.39

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Solution

The fourth proportional to 86,874.06, 130,962.09 and 81,087.39 is: 122,238.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,874.06 : 130,962.09 = 81,087.39 : x
  2. Step 2: Convert to fraction form
    86,874.06/130,962.09 = 81,087.39/x
  3. Step 3: Cross multiply
    86,874.06x = 130,962.09 × 81,087.39
  4. Step 4: Simplify right side
    86,874.06x = 10,619,374,067.05
  5. Step 5: Solve for x
    x = 10,619,374,067.05/86,874.06
  6. Step 6: Final answer
    x = 122,238.72

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.