Home / 83,408.06-125,112.90-21,078.56

Finding the Fourth Proportional to 83,408.06, 125,112.90 and 21,078.56

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Solution

The fourth proportional to 83,408.06, 125,112.90 and 21,078.56 is: 31,618.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,408.06 : 125,112.90 = 21,078.56 : x
  2. Step 2: Convert to fraction form
    83,408.06/125,112.90 = 21,078.56/x
  3. Step 3: Cross multiply
    83,408.06x = 125,112.90 × 21,078.56
  4. Step 4: Simplify right side
    83,408.06x = 2,637,199,769.42
  5. Step 5: Solve for x
    x = 2,637,199,769.42/83,408.06
  6. Step 6: Final answer
    x = 31,618.04

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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.