Home / 68,790.42-103,185.78-18,871.24

Finding the Fourth Proportional to 68,790.42, 103,185.78 and 18,871.24

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Solution

The fourth proportional to 68,790.42, 103,185.78 and 18,871.24 is: 28,306.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,790.42 : 103,185.78 = 18,871.24 : x
  2. Step 2: Convert to fraction form
    68,790.42/103,185.78 = 18,871.24/x
  3. Step 3: Cross multiply
    68,790.42x = 103,185.78 × 18,871.24
  4. Step 4: Simplify right side
    68,790.42x = 1,947,243,618.97
  5. Step 5: Solve for x
    x = 1,947,243,618.97/68,790.42
  6. Step 6: Final answer
    x = 28,306.90

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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.