Home / 212,906.10-319,359.20-86,615.04

Finding the Fourth Proportional to 212,906.10, 319,359.20 and 86,615.04

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Solution

The fourth proportional to 212,906.10, 319,359.20 and 86,615.04 is: 129,922.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,906.10 : 319,359.20 = 86,615.04 : x
  2. Step 2: Convert to fraction form
    212,906.10/319,359.20 = 86,615.04/x
  3. Step 3: Cross multiply
    212,906.10x = 319,359.20 × 86,615.04
  4. Step 4: Simplify right side
    212,906.10x = 27,661,309,882.37
  5. Step 5: Solve for x
    x = 27,661,309,882.37/212,906.10
  6. Step 6: Final answer
    x = 129,922.58

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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.