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Finding the Fourth Proportional to 66,490.90, 91,744.89 and 39,635.92

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Solution

The fourth proportional to 66,490.90, 91,744.89 and 39,635.92 is: 54,690.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,490.90 : 91,744.89 = 39,635.92 : x
  2. Step 2: Convert to fraction form
    66,490.90/91,744.89 = 39,635.92/x
  3. Step 3: Cross multiply
    66,490.90x = 91,744.89 × 39,635.92
  4. Step 4: Simplify right side
    66,490.90x = 3,636,393,120.45
  5. Step 5: Solve for x
    x = 3,636,393,120.45/66,490.90
  6. Step 6: Final answer
    x = 54,690.09

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.