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Finding the Fourth Proportional to 68,110.54, 93,991.07 and 39,431.42

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Solution

The fourth proportional to 68,110.54, 93,991.07 and 39,431.42 is: 54,414.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,110.54 : 93,991.07 = 39,431.42 : x
  2. Step 2: Convert to fraction form
    68,110.54/93,991.07 = 39,431.42/x
  3. Step 3: Cross multiply
    68,110.54x = 93,991.07 × 39,431.42
  4. Step 4: Simplify right side
    68,110.54x = 3,706,200,887.46
  5. Step 5: Solve for x
    x = 3,706,200,887.46/68,110.54
  6. Step 6: Final answer
    x = 54,414.50

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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.