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Finding the Fourth Proportional to 89,647.06, 123,715.89 and 49,363.78

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Solution

The fourth proportional to 89,647.06, 123,715.89 and 49,363.78 is: 68,123.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,647.06 : 123,715.89 = 49,363.78 : x
  2. Step 2: Convert to fraction form
    89,647.06/123,715.89 = 49,363.78/x
  3. Step 3: Cross multiply
    89,647.06x = 123,715.89 × 49,363.78
  4. Step 4: Simplify right side
    89,647.06x = 6,107,083,976.46
  5. Step 5: Solve for x
    x = 6,107,083,976.46/89,647.06
  6. Step 6: Final answer
    x = 68,123.64

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1.5x scale

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.