Home / 120,251.83-180,396.20-87,221.29

Finding the Fourth Proportional to 120,251.83, 180,396.20 and 87,221.29

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Solution

The fourth proportional to 120,251.83, 180,396.20 and 87,221.29 is: 130,845.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,251.83 : 180,396.20 = 87,221.29 : x
  2. Step 2: Convert to fraction form
    120,251.83/180,396.20 = 87,221.29/x
  3. Step 3: Cross multiply
    120,251.83x = 180,396.20 × 87,221.29
  4. Step 4: Simplify right side
    120,251.83x = 15,734,389,275.10
  5. Step 5: Solve for x
    x = 15,734,389,275.10/120,251.83
  6. Step 6: Final answer
    x = 130,845.32

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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.