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Finding the Fourth Proportional to 68,491, 102,659.28 and 51,796.90

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Solution

The fourth proportional to 68,491, 102,659.28 and 51,796.90 is: 77,636.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,491 : 102,659.28 = 51,796.90 : x
  2. Step 2: Convert to fraction form
    68,491/102,659.28 = 51,796.90/x
  3. Step 3: Cross multiply
    68,491x = 102,659.28 × 51,796.90
  4. Step 4: Simplify right side
    68,491x = 5,317,432,460.23
  5. Step 5: Solve for x
    x = 5,317,432,460.23/68,491
  6. Step 6: Final answer
    x = 77,636.95

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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.