Home / 120,316.79-180,652.60-67,112.72

Finding the Fourth Proportional to 120,316.79, 180,652.60 and 67,112.72

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Solution

The fourth proportional to 120,316.79, 180,652.60 and 67,112.72 is: 100,768.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,316.79 : 180,652.60 = 67,112.72 : x
  2. Step 2: Convert to fraction form
    120,316.79/180,652.60 = 67,112.72/x
  3. Step 3: Cross multiply
    120,316.79x = 180,652.60 × 67,112.72
  4. Step 4: Simplify right side
    120,316.79x = 12,124,086,691.67
  5. Step 5: Solve for x
    x = 12,124,086,691.67/120,316.79
  6. Step 6: Final answer
    x = 100,768.04

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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.