Home / 129,811.72-194,455.12-100,126.84

Finding the Fourth Proportional to 129,811.72, 194,455.12 and 100,126.84

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Solution

The fourth proportional to 129,811.72, 194,455.12 and 100,126.84 is: 149,987.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,811.72 : 194,455.12 = 100,126.84 : x
  2. Step 2: Convert to fraction form
    129,811.72/194,455.12 = 100,126.84/x
  3. Step 3: Cross multiply
    129,811.72x = 194,455.12 × 100,126.84
  4. Step 4: Simplify right side
    129,811.72x = 19,470,176,687.42
  5. Step 5: Solve for x
    x = 19,470,176,687.42/129,811.72
  6. Step 6: Final answer
    x = 149,987.82

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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.