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Finding the Fourth Proportional to 89,363.20, 123,320.80 and 49,619.20

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Solution

The fourth proportional to 89,363.20, 123,320.80 and 49,619.20 is: 68,474.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,363.20 : 123,320.80 = 49,619.20 : x
  2. Step 2: Convert to fraction form
    89,363.20/123,320.80 = 49,619.20/x
  3. Step 3: Cross multiply
    89,363.20x = 123,320.80 × 49,619.20
  4. Step 4: Simplify right side
    89,363.20x = 6,119,079,439.36
  5. Step 5: Solve for x
    x = 6,119,079,439.36/89,363.20
  6. Step 6: Final answer
    x = 68,474.27

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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.