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Finding the Fourth Proportional to 66,905.91, 92,329.92 and 36,690.48

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Solution

The fourth proportional to 66,905.91, 92,329.92 and 36,690.48 is: 50,632.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,905.91 : 92,329.92 = 36,690.48 : x
  2. Step 2: Convert to fraction form
    66,905.91/92,329.92 = 36,690.48/x
  3. Step 3: Cross multiply
    66,905.91x = 92,329.92 × 36,690.48
  4. Step 4: Simplify right side
    66,905.91x = 3,387,629,083.16
  5. Step 5: Solve for x
    x = 3,387,629,083.16/66,905.91
  6. Step 6: Final answer
    x = 50,632.73

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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.