Home / 261,138.90-391,736.62-111,395

Finding the Fourth Proportional to 261,138.90, 391,736.62 and 111,395

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Solution

The fourth proportional to 261,138.90, 391,736.62 and 111,395 is: 167,104.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,138.90 : 391,736.62 = 111,395 : x
  2. Step 2: Convert to fraction form
    261,138.90/391,736.62 = 111,395/x
  3. Step 3: Cross multiply
    261,138.90x = 391,736.62 × 111,395
  4. Step 4: Simplify right side
    261,138.90x = 43,637,500,784.90
  5. Step 5: Solve for x
    x = 43,637,500,784.90/261,138.90
  6. Step 6: Final answer
    x = 167,104.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.