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Finding the Fourth Proportional to 70,810.65, 106,179.39 and 20,884.39

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Solution

The fourth proportional to 70,810.65, 106,179.39 and 20,884.39 is: 31,315.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,810.65 : 106,179.39 = 20,884.39 : x
  2. Step 2: Convert to fraction form
    70,810.65/106,179.39 = 20,884.39/x
  3. Step 3: Cross multiply
    70,810.65x = 106,179.39 × 20,884.39
  4. Step 4: Simplify right side
    70,810.65x = 2,217,491,790.72
  5. Step 5: Solve for x
    x = 2,217,491,790.72/70,810.65
  6. Step 6: Final answer
    x = 31,315.79

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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.