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Finding the Fourth Proportional to 73,173.96, 100,979.73 and 39,639.96

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Solution

The fourth proportional to 73,173.96, 100,979.73 and 39,639.96 is: 54,702.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,173.96 : 100,979.73 = 39,639.96 : x
  2. Step 2: Convert to fraction form
    73,173.96/100,979.73 = 39,639.96/x
  3. Step 3: Cross multiply
    73,173.96x = 100,979.73 × 39,639.96
  4. Step 4: Simplify right side
    73,173.96x = 4,002,832,458.01
  5. Step 5: Solve for x
    x = 4,002,832,458.01/73,173.96
  6. Step 6: Final answer
    x = 54,702.96

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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.