Home / 120,315.35-180,650.44-67,111.28

Finding the Fourth Proportional to 120,315.35, 180,650.44 and 67,111.28

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Solution

The fourth proportional to 120,315.35, 180,650.44 and 67,111.28 is: 100,765.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,315.35 : 180,650.44 = 67,111.28 : x
  2. Step 2: Convert to fraction form
    120,315.35/180,650.44 = 67,111.28/x
  3. Step 3: Cross multiply
    120,315.35x = 180,650.44 × 67,111.28
  4. Step 4: Simplify right side
    120,315.35x = 12,123,681,741.54
  5. Step 5: Solve for x
    x = 12,123,681,741.54/120,315.35
  6. Step 6: Final answer
    x = 100,765.88

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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.