Home / 120,680.20-181,020.30-87,329.80

Finding the Fourth Proportional to 120,680.20, 181,020.30 and 87,329.80

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Solution

The fourth proportional to 120,680.20, 181,020.30 and 87,329.80 is: 130,994.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,680.20 : 181,020.30 = 87,329.80 : x
  2. Step 2: Convert to fraction form
    120,680.20/181,020.30 = 87,329.80/x
  3. Step 3: Cross multiply
    120,680.20x = 181,020.30 × 87,329.80
  4. Step 4: Simplify right side
    120,680.20x = 15,808,466,594.94
  5. Step 5: Solve for x
    x = 15,808,466,594.94/120,680.20
  6. Step 6: Final answer
    x = 130,994.70

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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.