Home / 120,180.56-180,446.04-85,305.20

Finding the Fourth Proportional to 120,180.56, 180,446.04 and 85,305.20

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Solution

The fourth proportional to 120,180.56, 180,446.04 and 85,305.20 is: 128,082.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,180.56 : 180,446.04 = 85,305.20 : x
  2. Step 2: Convert to fraction form
    120,180.56/180,446.04 = 85,305.20/x
  3. Step 3: Cross multiply
    120,180.56x = 180,446.04 × 85,305.20
  4. Step 4: Simplify right side
    120,180.56x = 15,392,985,531.41
  5. Step 5: Solve for x
    x = 15,392,985,531.41/120,180.56
  6. Step 6: Final answer
    x = 128,082.16

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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.