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Finding the Fourth Proportional to 89,361.92, 123,319.56 and 49,078.28

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Solution

The fourth proportional to 89,361.92, 123,319.56 and 49,078.28 is: 67,728.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,361.92 : 123,319.56 = 49,078.28 : x
  2. Step 2: Convert to fraction form
    89,361.92/123,319.56 = 49,078.28/x
  3. Step 3: Cross multiply
    89,361.92x = 123,319.56 × 49,078.28
  4. Step 4: Simplify right side
    89,361.92x = 6,052,311,895.16
  5. Step 5: Solve for x
    x = 6,052,311,895.16/89,361.92
  6. Step 6: Final answer
    x = 67,728.09

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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.