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Finding the Fourth Proportional to 66,963.12, 92,412 and 40,110

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Solution

The fourth proportional to 66,963.12, 92,412 and 40,110 is: 55,353.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,963.12 : 92,412 = 40,110 : x
  2. Step 2: Convert to fraction form
    66,963.12/92,412 = 40,110/x
  3. Step 3: Cross multiply
    66,963.12x = 92,412 × 40,110
  4. Step 4: Simplify right side
    66,963.12x = 3,706,645,320
  5. Step 5: Solve for x
    x = 3,706,645,320/66,963.12
  6. Step 6: Final answer
    x = 55,353.53

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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.