Home / 129,396.20-193,835.10-87,405.80

Finding the Fourth Proportional to 129,396.20, 193,835.10 and 87,405.80

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Solution

The fourth proportional to 129,396.20, 193,835.10 and 87,405.80 is: 130,933.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,396.20 : 193,835.10 = 87,405.80 : x
  2. Step 2: Convert to fraction form
    129,396.20/193,835.10 = 87,405.80/x
  3. Step 3: Cross multiply
    129,396.20x = 193,835.10 × 87,405.80
  4. Step 4: Simplify right side
    129,396.20x = 16,942,311,983.58
  5. Step 5: Solve for x
    x = 16,942,311,983.58/129,396.20
  6. Step 6: Final answer
    x = 130,933.61

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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.