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Finding the Fourth Proportional to 68,853.78, 103,061.88 and 37,218.78

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Solution

The fourth proportional to 68,853.78, 103,061.88 and 37,218.78 is: 55,709.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,853.78 : 103,061.88 = 37,218.78 : x
  2. Step 2: Convert to fraction form
    68,853.78/103,061.88 = 37,218.78/x
  3. Step 3: Cross multiply
    68,853.78x = 103,061.88 × 37,218.78
  4. Step 4: Simplify right side
    68,853.78x = 3,835,837,438.11
  5. Step 5: Solve for x
    x = 3,835,837,438.11/68,853.78
  6. Step 6: Final answer
    x = 55,709.90

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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.