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Finding the Fourth Proportional to 68,112.10, 93,993.22 and 39,432.97

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Solution

The fourth proportional to 68,112.10, 93,993.22 and 39,432.97 is: 54,416.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,112.10 : 93,993.22 = 39,432.97 : x
  2. Step 2: Convert to fraction form
    68,112.10/93,993.22 = 39,432.97/x
  3. Step 3: Cross multiply
    68,112.10x = 93,993.22 × 39,432.97
  4. Step 4: Simplify right side
    68,112.10x = 3,706,431,991.25
  5. Step 5: Solve for x
    x = 3,706,431,991.25/68,112.10
  6. Step 6: Final answer
    x = 54,416.64

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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.