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Finding the Fourth Proportional to 68,615.35, 103,040.81 and 42,116.94

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Solution

The fourth proportional to 68,615.35, 103,040.81 and 42,116.94 is: 63,247.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,615.35 : 103,040.81 = 42,116.94 : x
  2. Step 2: Convert to fraction form
    68,615.35/103,040.81 = 42,116.94/x
  3. Step 3: Cross multiply
    68,615.35x = 103,040.81 × 42,116.94
  4. Step 4: Simplify right side
    68,615.35x = 4,339,763,144.13
  5. Step 5: Solve for x
    x = 4,339,763,144.13/68,615.35
  6. Step 6: Final answer
    x = 63,247.71

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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.