Home / 68,739.28-103,105.08-18,815.72

Finding the Fourth Proportional to 68,739.28, 103,105.08 and 18,815.72

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Solution

The fourth proportional to 68,739.28, 103,105.08 and 18,815.72 is: 28,222.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,739.28 : 103,105.08 = 18,815.72 : x
  2. Step 2: Convert to fraction form
    68,739.28/103,105.08 = 18,815.72/x
  3. Step 3: Cross multiply
    68,739.28x = 103,105.08 × 18,815.72
  4. Step 4: Simplify right side
    68,739.28x = 1,939,996,315.86
  5. Step 5: Solve for x
    x = 1,939,996,315.86/68,739.28
  6. Step 6: Final answer
    x = 28,222.53

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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.