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Finding the Fourth Proportional to 68,406.24, 94,401 and 40,112.40

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Solution

The fourth proportional to 68,406.24, 94,401 and 40,112.40 is: 55,355.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,406.24 : 94,401 = 40,112.40 : x
  2. Step 2: Convert to fraction form
    68,406.24/94,401 = 40,112.40/x
  3. Step 3: Cross multiply
    68,406.24x = 94,401 × 40,112.40
  4. Step 4: Simplify right side
    68,406.24x = 3,786,650,672.40
  5. Step 5: Solve for x
    x = 3,786,650,672.40/68,406.24
  6. Step 6: Final answer
    x = 55,355.34

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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.