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Finding the Fourth Proportional to 68,639.80, 102,911.10 and 26,503.60

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Solution

The fourth proportional to 68,639.80, 102,911.10 and 26,503.60 is: 39,736.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,639.80 : 102,911.10 = 26,503.60 : x
  2. Step 2: Convert to fraction form
    68,639.80/102,911.10 = 26,503.60/x
  3. Step 3: Cross multiply
    68,639.80x = 102,911.10 × 26,503.60
  4. Step 4: Simplify right side
    68,639.80x = 2,727,514,629.96
  5. Step 5: Solve for x
    x = 2,727,514,629.96/68,639.80
  6. Step 6: Final answer
    x = 39,736.63

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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.