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Finding the Fourth Proportional to 120,719.80, 180,863.70 and 58,252.60

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Solution

The fourth proportional to 120,719.80, 180,863.70 and 58,252.60 is: 87,274.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,719.80 : 180,863.70 = 58,252.60 : x
  2. Step 2: Convert to fraction form
    120,719.80/180,863.70 = 58,252.60/x
  3. Step 3: Cross multiply
    120,719.80x = 180,863.70 × 58,252.60
  4. Step 4: Simplify right side
    120,719.80x = 10,535,780,770.62
  5. Step 5: Solve for x
    x = 10,535,780,770.62/120,719.80
  6. Step 6: Final answer
    x = 87,274.67

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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.