Home / 83,408.28-125,112.48-21,078.76

Finding the Fourth Proportional to 83,408.28, 125,112.48 and 21,078.76

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Solution

The fourth proportional to 83,408.28, 125,112.48 and 21,078.76 is: 31,618.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,408.28 : 125,112.48 = 21,078.76 : x
  2. Step 2: Convert to fraction form
    83,408.28/125,112.48 = 21,078.76/x
  3. Step 3: Cross multiply
    83,408.28x = 125,112.48 × 21,078.76
  4. Step 4: Simplify right side
    83,408.28x = 2,637,215,938.92
  5. Step 5: Solve for x
    x = 2,637,215,938.92/83,408.28
  6. Step 6: Final answer
    x = 31,618.16

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1.5x scale

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.