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Finding the Fourth Proportional to 66,766.41, 92,137.50 and 39,907.62

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Solution

The fourth proportional to 66,766.41, 92,137.50 and 39,907.62 is: 55,072.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,766.41 : 92,137.50 = 39,907.62 : x
  2. Step 2: Convert to fraction form
    66,766.41/92,137.50 = 39,907.62/x
  3. Step 3: Cross multiply
    66,766.41x = 92,137.50 × 39,907.62
  4. Step 4: Simplify right side
    66,766.41x = 3,676,988,337.75
  5. Step 5: Solve for x
    x = 3,676,988,337.75/66,766.41
  6. Step 6: Final answer
    x = 55,072.43

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1.5x scale

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.