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Finding the Fourth Proportional to 66,805.90, 92,204.02 and 39,951.36

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Solution

The fourth proportional to 66,805.90, 92,204.02 and 39,951.36 is: 55,139.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,805.90 : 92,204.02 = 39,951.36 : x
  2. Step 2: Convert to fraction form
    66,805.90/92,204.02 = 39,951.36/x
  3. Step 3: Cross multiply
    66,805.90x = 92,204.02 × 39,951.36
  4. Step 4: Simplify right side
    66,805.90x = 3,683,676,046.41
  5. Step 5: Solve for x
    x = 3,683,676,046.41/66,805.90
  6. Step 6: Final answer
    x = 55,139.98

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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.