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Finding the Fourth Proportional to 68,933.80, 103,407.90 and 19,013.92

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Solution

The fourth proportional to 68,933.80, 103,407.90 and 19,013.92 is: 28,522.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,933.80 : 103,407.90 = 19,013.92 : x
  2. Step 2: Convert to fraction form
    68,933.80/103,407.90 = 19,013.92/x
  3. Step 3: Cross multiply
    68,933.80x = 103,407.90 × 19,013.92
  4. Step 4: Simplify right side
    68,933.80x = 1,966,189,537.97
  5. Step 5: Solve for x
    x = 1,966,189,537.97/68,933.80
  6. Step 6: Final answer
    x = 28,522.87

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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.