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Finding the Fourth Proportional to 89,672.95, 123,743.86 and 49,378.85

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Solution

The fourth proportional to 89,672.95, 123,743.86 and 49,378.85 is: 68,140.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,672.95 : 123,743.86 = 49,378.85 : x
  2. Step 2: Convert to fraction form
    89,672.95/123,743.86 = 49,378.85/x
  3. Step 3: Cross multiply
    89,672.95x = 123,743.86 × 49,378.85
  4. Step 4: Simplify right side
    89,672.95x = 6,110,329,501.36
  5. Step 5: Solve for x
    x = 6,110,329,501.36/89,672.95
  6. Step 6: Final answer
    x = 68,140.16

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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.