Home / 129,438.14-194,121.60-81,982.04

Finding the Fourth Proportional to 129,438.14, 194,121.60 and 81,982.04

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Solution

The fourth proportional to 129,438.14, 194,121.60 and 81,982.04 is: 122,950.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,438.14 : 194,121.60 = 81,982.04 : x
  2. Step 2: Convert to fraction form
    129,438.14/194,121.60 = 81,982.04/x
  3. Step 3: Cross multiply
    129,438.14x = 194,121.60 × 81,982.04
  4. Step 4: Simplify right side
    129,438.14x = 15,914,484,776.06
  5. Step 5: Solve for x
    x = 15,914,484,776.06/129,438.14
  6. Step 6: Final answer
    x = 122,950.51

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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.