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Finding the Fourth Proportional to 120,258.96, 180,450.69 and 87,251.46

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Solution

The fourth proportional to 120,258.96, 180,450.69 and 87,251.46 is: 130,922.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,258.96 : 180,450.69 = 87,251.46 : x
  2. Step 2: Convert to fraction form
    120,258.96/180,450.69 = 87,251.46/x
  3. Step 3: Cross multiply
    120,258.96x = 180,450.69 × 87,251.46
  4. Step 4: Simplify right side
    120,258.96x = 15,744,585,724.25
  5. Step 5: Solve for x
    x = 15,744,585,724.25/120,258.96
  6. Step 6: Final answer
    x = 130,922.35

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1.5x scale

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.