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Finding the Fourth Proportional to 68,833.77, 103,242.12 and 18,917.89

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Solution

The fourth proportional to 68,833.77, 103,242.12 and 18,917.89 is: 28,374.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,833.77 : 103,242.12 = 18,917.89 : x
  2. Step 2: Convert to fraction form
    68,833.77/103,242.12 = 18,917.89/x
  3. Step 3: Cross multiply
    68,833.77x = 103,242.12 × 18,917.89
  4. Step 4: Simplify right side
    68,833.77x = 1,953,123,229.24
  5. Step 5: Solve for x
    x = 1,953,123,229.24/68,833.77
  6. Step 6: Final answer
    x = 28,374.49

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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.