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Finding the Fourth Proportional to 68,783.40, 94,940.78 and 40,505.49

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Solution

The fourth proportional to 68,783.40, 94,940.78 and 40,505.49 is: 55,909.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,783.40 : 94,940.78 = 40,505.49 : x
  2. Step 2: Convert to fraction form
    68,783.40/94,940.78 = 40,505.49/x
  3. Step 3: Cross multiply
    68,783.40x = 94,940.78 × 40,505.49
  4. Step 4: Simplify right side
    68,783.40x = 3,845,622,612.35
  5. Step 5: Solve for x
    x = 3,845,622,612.35/68,783.40
  6. Step 6: Final answer
    x = 55,909.17

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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.