Home / 120,443.76-180,331.92-90,771.84

Finding the Fourth Proportional to 120,443.76, 180,331.92 and 90,771.84

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Solution

The fourth proportional to 120,443.76, 180,331.92 and 90,771.84 is: 135,906.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,443.76 : 180,331.92 = 90,771.84 : x
  2. Step 2: Convert to fraction form
    120,443.76/180,331.92 = 90,771.84/x
  3. Step 3: Cross multiply
    120,443.76x = 180,331.92 × 90,771.84
  4. Step 4: Simplify right side
    120,443.76x = 16,369,060,189.13
  5. Step 5: Solve for x
    x = 16,369,060,189.13/120,443.76
  6. Step 6: Final answer
    x = 135,906.25

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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.