Home / 120,665.32-180,735.42-81,046.60

Finding the Fourth Proportional to 120,665.32, 180,735.42 and 81,046.60

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Solution

The fourth proportional to 120,665.32, 180,735.42 and 81,046.60 is: 121,393.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,665.32 : 180,735.42 = 81,046.60 : x
  2. Step 2: Convert to fraction form
    120,665.32/180,735.42 = 81,046.60/x
  3. Step 3: Cross multiply
    120,665.32x = 180,735.42 × 81,046.60
  4. Step 4: Simplify right side
    120,665.32x = 14,647,991,290.57
  5. Step 5: Solve for x
    x = 14,647,991,290.57/120,665.32
  6. Step 6: Final answer
    x = 121,393.55

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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.