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Finding the Fourth Proportional to 68,487.40, 94,522.98 and 40,205.80

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Solution

The fourth proportional to 68,487.40, 94,522.98 and 40,205.80 is: 55,490.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,487.40 : 94,522.98 = 40,205.80 : x
  2. Step 2: Convert to fraction form
    68,487.40/94,522.98 = 40,205.80/x
  3. Step 3: Cross multiply
    68,487.40x = 94,522.98 × 40,205.80
  4. Step 4: Simplify right side
    68,487.40x = 3,800,372,029.28
  5. Step 5: Solve for x
    x = 3,800,372,029.28/68,487.40
  6. Step 6: Final answer
    x = 55,490.09

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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.