Home / 120,258.87-180,450.55-87,251.37

Finding the Fourth Proportional to 120,258.87, 180,450.55 and 87,251.37

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Solution

The fourth proportional to 120,258.87, 180,450.55 and 87,251.37 is: 130,922.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,258.87 : 180,450.55 = 87,251.37 : x
  2. Step 2: Convert to fraction form
    120,258.87/180,450.55 = 87,251.37/x
  3. Step 3: Cross multiply
    120,258.87x = 180,450.55 × 87,251.37
  4. Step 4: Simplify right side
    120,258.87x = 15,744,557,704.75
  5. Step 5: Solve for x
    x = 15,744,557,704.75/120,258.87
  6. Step 6: Final answer
    x = 130,922.22

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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.