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Finding the Fourth Proportional to 58,228.64, 87,361.43 and 20,787.91

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Solution

The fourth proportional to 58,228.64, 87,361.43 and 20,787.91 is: 31,188.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,228.64 : 87,361.43 = 20,787.91 : x
  2. Step 2: Convert to fraction form
    58,228.64/87,361.43 = 20,787.91/x
  3. Step 3: Cross multiply
    58,228.64x = 87,361.43 × 20,787.91
  4. Step 4: Simplify right side
    58,228.64x = 1,816,061,658.78
  5. Step 5: Solve for x
    x = 1,816,061,658.78/58,228.64
  6. Step 6: Final answer
    x = 31,188.46

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Why These Related Problems?

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