Home / 129,765.48-194,870.58-80,139.24

Finding the Fourth Proportional to 129,765.48, 194,870.58 and 80,139.24

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Solution

The fourth proportional to 129,765.48, 194,870.58 and 80,139.24 is: 120,346.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,765.48 : 194,870.58 = 80,139.24 : x
  2. Step 2: Convert to fraction form
    129,765.48/194,870.58 = 80,139.24/x
  3. Step 3: Cross multiply
    129,765.48x = 194,870.58 × 80,139.24
  4. Step 4: Simplify right side
    129,765.48x = 15,616,780,179.56
  5. Step 5: Solve for x
    x = 15,616,780,179.56/129,765.48
  6. Step 6: Final answer
    x = 120,346.18

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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.