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Finding the Fourth Proportional to 78,299.96, 108,338.73 and 68,249.48

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Solution

The fourth proportional to 78,299.96, 108,338.73 and 68,249.48 is: 94,432.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,299.96 : 108,338.73 = 68,249.48 : x
  2. Step 2: Convert to fraction form
    78,299.96/108,338.73 = 68,249.48/x
  3. Step 3: Cross multiply
    78,299.96x = 108,338.73 × 68,249.48
  4. Step 4: Simplify right side
    78,299.96x = 7,394,061,986.36
  5. Step 5: Solve for x
    x = 7,394,061,986.36/78,299.96
  6. Step 6: Final answer
    x = 94,432.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.