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Finding the Fourth Proportional to 287,361.88, 431,042.82 and 87,683.31

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Solution

The fourth proportional to 287,361.88, 431,042.82 and 87,683.31 is: 131,524.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,361.88 : 431,042.82 = 87,683.31 : x
  2. Step 2: Convert to fraction form
    287,361.88/431,042.82 = 87,683.31/x
  3. Step 3: Cross multiply
    287,361.88x = 431,042.82 × 87,683.31
  4. Step 4: Simplify right side
    287,361.88x = 37,795,260,880.52
  5. Step 5: Solve for x
    x = 37,795,260,880.52/287,361.88
  6. Step 6: Final answer
    x = 131,524.97

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.