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Finding the Fourth Proportional to 89,718.96, 123,811.56 and 49,431.72

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Solution

The fourth proportional to 89,718.96, 123,811.56 and 49,431.72 is: 68,215.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,718.96 : 123,811.56 = 49,431.72 : x
  2. Step 2: Convert to fraction form
    89,718.96/123,811.56 = 49,431.72/x
  3. Step 3: Cross multiply
    89,718.96x = 123,811.56 × 49,431.72
  4. Step 4: Simplify right side
    89,718.96x = 6,120,218,366.68
  5. Step 5: Solve for x
    x = 6,120,218,366.68/89,718.96
  6. Step 6: Final answer
    x = 68,215.44

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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.