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Finding the Fourth Proportional to 103,615.01, 155,422.52 and 68,546.47

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Solution

The fourth proportional to 103,615.01, 155,422.52 and 68,546.47 is: 102,819.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,615.01 : 155,422.52 = 68,546.47 : x
  2. Step 2: Convert to fraction form
    103,615.01/155,422.52 = 68,546.47/x
  3. Step 3: Cross multiply
    103,615.01x = 155,422.52 × 68,546.47
  4. Step 4: Simplify right side
    103,615.01x = 10,653,665,104.50
  5. Step 5: Solve for x
    x = 10,653,665,104.50/103,615.01
  6. Step 6: Final answer
    x = 102,819.71

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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.