Home / 131,721.78-181,774.48-71,291

Finding the Fourth Proportional to 131,721.78, 181,774.48 and 71,291

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Solution

The fourth proportional to 131,721.78, 181,774.48 and 71,291 is: 98,380.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,721.78 : 181,774.48 = 71,291 : x
  2. Step 2: Convert to fraction form
    131,721.78/181,774.48 = 71,291/x
  3. Step 3: Cross multiply
    131,721.78x = 181,774.48 × 71,291
  4. Step 4: Simplify right side
    131,721.78x = 12,958,884,453.68
  5. Step 5: Solve for x
    x = 12,958,884,453.68/131,721.78
  6. Step 6: Final answer
    x = 98,380.73

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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.