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Finding the Fourth Proportional to 66,964.88, 92,405.22 and 40,106.90

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Solution

The fourth proportional to 66,964.88, 92,405.22 and 40,106.90 is: 55,343.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,964.88 : 92,405.22 = 40,106.90 : x
  2. Step 2: Convert to fraction form
    66,964.88/92,405.22 = 40,106.90/x
  3. Step 3: Cross multiply
    66,964.88x = 92,405.22 × 40,106.90
  4. Step 4: Simplify right side
    66,964.88x = 3,706,086,918.02
  5. Step 5: Solve for x
    x = 3,706,086,918.02/66,964.88
  6. Step 6: Final answer
    x = 55,343.74

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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.