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Finding the Fourth Proportional to 89,439, 123,425.82 and 49,695

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Solution

The fourth proportional to 89,439, 123,425.82 and 49,695 is: 68,579.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,439 : 123,425.82 = 49,695 : x
  2. Step 2: Convert to fraction form
    89,439/123,425.82 = 49,695/x
  3. Step 3: Cross multiply
    89,439x = 123,425.82 × 49,695
  4. Step 4: Simplify right side
    89,439x = 6,133,646,124.90
  5. Step 5: Solve for x
    x = 6,133,646,124.90/89,439
  6. Step 6: Final answer
    x = 68,579.10

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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.