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Finding the Fourth Proportional to 66,590.85, 91,871.46 and 39,361.19

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Solution

The fourth proportional to 66,590.85, 91,871.46 and 39,361.19 is: 54,304.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,590.85 : 91,871.46 = 39,361.19 : x
  2. Step 2: Convert to fraction form
    66,590.85/91,871.46 = 39,361.19/x
  3. Step 3: Cross multiply
    66,590.85x = 91,871.46 × 39,361.19
  4. Step 4: Simplify right side
    66,590.85x = 3,616,169,992.64
  5. Step 5: Solve for x
    x = 3,616,169,992.64/66,590.85
  6. Step 6: Final answer
    x = 54,304.31

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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.