Home / 71,747.82-99,013.32-39,919.68

Finding the Fourth Proportional to 71,747.82, 99,013.32 and 39,919.68

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Solution

The fourth proportional to 71,747.82, 99,013.32 and 39,919.68 is: 55,089.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,747.82 : 99,013.32 = 39,919.68 : x
  2. Step 2: Convert to fraction form
    71,747.82/99,013.32 = 39,919.68/x
  3. Step 3: Cross multiply
    71,747.82x = 99,013.32 × 39,919.68
  4. Step 4: Simplify right side
    71,747.82x = 3,952,580,050.14
  5. Step 5: Solve for x
    x = 3,952,580,050.14/71,747.82
  6. Step 6: Final answer
    x = 55,089.90

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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.