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Finding the Fourth Proportional to 73,173.56, 100,979.70 and 39,639.56

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Solution

The fourth proportional to 73,173.56, 100,979.70 and 39,639.56 is: 54,702.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,173.56 : 100,979.70 = 39,639.56 : x
  2. Step 2: Convert to fraction form
    73,173.56/100,979.70 = 39,639.56/x
  3. Step 3: Cross multiply
    73,173.56x = 100,979.70 × 39,639.56
  4. Step 4: Simplify right side
    73,173.56x = 4,002,790,876.93
  5. Step 5: Solve for x
    x = 4,002,790,876.93/73,173.56
  6. Step 6: Final answer
    x = 54,702.69

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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.