Home / 129,617.28-194,231.52-99,990.72

Finding the Fourth Proportional to 129,617.28, 194,231.52 and 99,990.72

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Solution

The fourth proportional to 129,617.28, 194,231.52 and 99,990.72 is: 149,836.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,617.28 : 194,231.52 = 99,990.72 : x
  2. Step 2: Convert to fraction form
    129,617.28/194,231.52 = 99,990.72/x
  3. Step 3: Cross multiply
    129,617.28x = 194,231.52 × 99,990.72
  4. Step 4: Simplify right side
    129,617.28x = 19,421,349,531.49
  5. Step 5: Solve for x
    x = 19,421,349,531.49/129,617.28
  6. Step 6: Final answer
    x = 149,836.11

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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.