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Finding the Fourth Proportional to 66,963.88, 92,403.84 and 40,105.90

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Solution

The fourth proportional to 66,963.88, 92,403.84 and 40,105.90 is: 55,342.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,963.88 : 92,403.84 = 40,105.90 : x
  2. Step 2: Convert to fraction form
    66,963.88/92,403.84 = 40,105.90/x
  3. Step 3: Cross multiply
    66,963.88x = 92,403.84 × 40,105.90
  4. Step 4: Simplify right side
    66,963.88x = 3,705,939,166.66
  5. Step 5: Solve for x
    x = 3,705,939,166.66/66,963.88
  6. Step 6: Final answer
    x = 55,342.36

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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.