Home / 318,105.09-438,988.11-172,911.51

Finding the Fourth Proportional to 318,105.09, 438,988.11 and 172,911.51

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Solution

The fourth proportional to 318,105.09, 438,988.11 and 172,911.51 is: 238,619.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,105.09 : 438,988.11 = 172,911.51 : x
  2. Step 2: Convert to fraction form
    318,105.09/438,988.11 = 172,911.51/x
  3. Step 3: Cross multiply
    318,105.09x = 438,988.11 × 172,911.51
  4. Step 4: Simplify right side
    318,105.09x = 75,906,096,972.15
  5. Step 5: Solve for x
    x = 75,906,096,972.15/318,105.09
  6. Step 6: Final answer
    x = 238,619.56

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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.