Home / 81,408.73-122,126.95-28,086.25

Finding the Fourth Proportional to 81,408.73, 122,126.95 and 28,086.25

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Solution

The fourth proportional to 81,408.73, 122,126.95 and 28,086.25 is: 42,134.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,408.73 : 122,126.95 = 28,086.25 : x
  2. Step 2: Convert to fraction form
    81,408.73/122,126.95 = 28,086.25/x
  3. Step 3: Cross multiply
    81,408.73x = 122,126.95 × 28,086.25
  4. Step 4: Simplify right side
    81,408.73x = 3,430,088,049.44
  5. Step 5: Solve for x
    x = 3,430,088,049.44/81,408.73
  6. Step 6: Final answer
    x = 42,134.16

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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.