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Finding the Fourth Proportional to 72,606.72, 100,196.72 and 41,979.15

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Solution

The fourth proportional to 72,606.72, 100,196.72 and 41,979.15 is: 57,930.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,606.72 : 100,196.72 = 41,979.15 : x
  2. Step 2: Convert to fraction form
    72,606.72/100,196.72 = 41,979.15/x
  3. Step 3: Cross multiply
    72,606.72x = 100,196.72 × 41,979.15
  4. Step 4: Simplify right side
    72,606.72x = 4,206,172,928.49
  5. Step 5: Solve for x
    x = 4,206,172,928.49/72,606.72
  6. Step 6: Final answer
    x = 57,930.90

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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.