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Finding the Fourth Proportional to 68,770.40, 103,095.60 and 26,679.20

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Solution

The fourth proportional to 68,770.40, 103,095.60 and 26,679.20 is: 39,995.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,770.40 : 103,095.60 = 26,679.20 : x
  2. Step 2: Convert to fraction form
    68,770.40/103,095.60 = 26,679.20/x
  3. Step 3: Cross multiply
    68,770.40x = 103,095.60 × 26,679.20
  4. Step 4: Simplify right side
    68,770.40x = 2,750,508,131.52
  5. Step 5: Solve for x
    x = 2,750,508,131.52/68,770.40
  6. Step 6: Final answer
    x = 39,995.52

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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.