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Finding the Fourth Proportional to 68,679.40, 102,969.90 and 26,523.40

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Solution

The fourth proportional to 68,679.40, 102,969.90 and 26,523.40 is: 39,766.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,679.40 : 102,969.90 = 26,523.40 : x
  2. Step 2: Convert to fraction form
    68,679.40/102,969.90 = 26,523.40/x
  3. Step 3: Cross multiply
    68,679.40x = 102,969.90 × 26,523.40
  4. Step 4: Simplify right side
    68,679.40x = 2,731,111,845.66
  5. Step 5: Solve for x
    x = 2,731,111,845.66/68,679.40
  6. Step 6: Final answer
    x = 39,766.10

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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.