Home / 136,939.29-189,217.67-105,380.88

Finding the Fourth Proportional to 136,939.29, 189,217.67 and 105,380.88

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Solution

The fourth proportional to 136,939.29, 189,217.67 and 105,380.88 is: 145,611.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,939.29 : 189,217.67 = 105,380.88 : x
  2. Step 2: Convert to fraction form
    136,939.29/189,217.67 = 105,380.88/x
  3. Step 3: Cross multiply
    136,939.29x = 189,217.67 × 105,380.88
  4. Step 4: Simplify right side
    136,939.29x = 19,939,924,049.25
  5. Step 5: Solve for x
    x = 19,939,924,049.25/136,939.29
  6. Step 6: Final answer
    x = 145,611.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.