Home / 71,828.72-99,123.77-39,998.75

Finding the Fourth Proportional to 71,828.72, 99,123.77 and 39,998.75

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Solution

The fourth proportional to 71,828.72, 99,123.77 and 39,998.75 is: 55,198.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,828.72 : 99,123.77 = 39,998.75 : x
  2. Step 2: Convert to fraction form
    71,828.72/99,123.77 = 39,998.75/x
  3. Step 3: Cross multiply
    71,828.72x = 99,123.77 × 39,998.75
  4. Step 4: Simplify right side
    71,828.72x = 3,964,827,243.09
  5. Step 5: Solve for x
    x = 3,964,827,243.09/71,828.72
  6. Step 6: Final answer
    x = 55,198.36

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Double scale
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Similar ratio
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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.