Home / 105,731.90-158,286.72-70,584.38

Finding the Fourth Proportional to 105,731.90, 158,286.72 and 70,584.38

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Solution

The fourth proportional to 105,731.90, 158,286.72 and 70,584.38 is: 105,668.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,731.90 : 158,286.72 = 70,584.38 : x
  2. Step 2: Convert to fraction form
    105,731.90/158,286.72 = 70,584.38/x
  3. Step 3: Cross multiply
    105,731.90x = 158,286.72 × 70,584.38
  4. Step 4: Simplify right side
    105,731.90x = 11,172,569,993.43
  5. Step 5: Solve for x
    x = 11,172,569,993.43/105,731.90
  6. Step 6: Final answer
    x = 105,668.87

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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.