Home / 120,189.30-180,217.39-49,161.81

Finding the Fourth Proportional to 120,189.30, 180,217.39 and 49,161.81

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Solution

The fourth proportional to 120,189.30, 180,217.39 and 49,161.81 is: 73,715.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,189.30 : 180,217.39 = 49,161.81 : x
  2. Step 2: Convert to fraction form
    120,189.30/180,217.39 = 49,161.81/x
  3. Step 3: Cross multiply
    120,189.30x = 180,217.39 × 49,161.81
  4. Step 4: Simplify right side
    120,189.30x = 8,859,813,085.88
  5. Step 5: Solve for x
    x = 8,859,813,085.88/120,189.30
  6. Step 6: Final answer
    x = 73,715.49

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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.