Home / 70,257.26-105,391.40-20,338.11

Finding the Fourth Proportional to 70,257.26, 105,391.40 and 20,338.11

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Solution

The fourth proportional to 70,257.26, 105,391.40 and 20,338.11 is: 30,508.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,257.26 : 105,391.40 = 20,338.11 : x
  2. Step 2: Convert to fraction form
    70,257.26/105,391.40 = 20,338.11/x
  3. Step 3: Cross multiply
    70,257.26x = 105,391.40 × 20,338.11
  4. Step 4: Simplify right side
    70,257.26x = 2,143,461,784.56
  5. Step 5: Solve for x
    x = 2,143,461,784.56/70,257.26
  6. Step 6: Final answer
    x = 30,508.76

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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.