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Finding the Fourth Proportional to 85,787.87, 128,698.97 and 29,630.03

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Solution

The fourth proportional to 85,787.87, 128,698.97 and 29,630.03 is: 44,450.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,787.87 : 128,698.97 = 29,630.03 : x
  2. Step 2: Convert to fraction form
    85,787.87/128,698.97 = 29,630.03/x
  3. Step 3: Cross multiply
    85,787.87x = 128,698.97 × 29,630.03
  4. Step 4: Simplify right side
    85,787.87x = 3,813,353,550.42
  5. Step 5: Solve for x
    x = 3,813,353,550.42/85,787.87
  6. Step 6: Final answer
    x = 44,450.97

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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.