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Finding the Fourth Proportional to 85,786.46, 128,696.88 and 29,628.62

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Solution

The fourth proportional to 85,786.46, 128,696.88 and 29,628.62 is: 44,448.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,786.46 : 128,696.88 = 29,628.62 : x
  2. Step 2: Convert to fraction form
    85,786.46/128,696.88 = 29,628.62/x
  3. Step 3: Cross multiply
    85,786.46x = 128,696.88 × 29,628.62
  4. Step 4: Simplify right side
    85,786.46x = 3,813,110,804.56
  5. Step 5: Solve for x
    x = 3,813,110,804.56/85,786.46
  6. Step 6: Final answer
    x = 44,448.87

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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.