Home / 120,645.20-180,880.32-81,104.24

Finding the Fourth Proportional to 120,645.20, 180,880.32 and 81,104.24

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Solution

The fourth proportional to 120,645.20, 180,880.32 and 81,104.24 is: 121,597.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,645.20 : 180,880.32 = 81,104.24 : x
  2. Step 2: Convert to fraction form
    120,645.20/180,880.32 = 81,104.24/x
  3. Step 3: Cross multiply
    120,645.20x = 180,880.32 × 81,104.24
  4. Step 4: Simplify right side
    120,645.20x = 14,670,160,884.56
  5. Step 5: Solve for x
    x = 14,670,160,884.56/120,645.20
  6. Step 6: Final answer
    x = 121,597.55

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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.