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Finding the Fourth Proportional to 68,747, 94,856.46 and 40,455.80

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Solution

The fourth proportional to 68,747, 94,856.46 and 40,455.80 is: 55,820.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,747 : 94,856.46 = 40,455.80 : x
  2. Step 2: Convert to fraction form
    68,747/94,856.46 = 40,455.80/x
  3. Step 3: Cross multiply
    68,747x = 94,856.46 × 40,455.80
  4. Step 4: Simplify right side
    68,747x = 3,837,493,974.47
  5. Step 5: Solve for x
    x = 3,837,493,974.47/68,747
  6. Step 6: Final answer
    x = 55,820.53

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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.