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Finding the Fourth Proportional to 99,326.63, 136,979.94 and 73,896.68

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Solution

The fourth proportional to 99,326.63, 136,979.94 and 73,896.68 is: 101,909.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,326.63 : 136,979.94 = 73,896.68 : x
  2. Step 2: Convert to fraction form
    99,326.63/136,979.94 = 73,896.68/x
  3. Step 3: Cross multiply
    99,326.63x = 136,979.94 × 73,896.68
  4. Step 4: Simplify right side
    99,326.63x = 10,122,363,412.16
  5. Step 5: Solve for x
    x = 10,122,363,412.16/99,326.63
  6. Step 6: Final answer
    x = 101,909.86

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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.