Home / 108,717.20-162,857.10-73,287.80

Finding the Fourth Proportional to 108,717.20, 162,857.10 and 73,287.80

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Solution

The fourth proportional to 108,717.20, 162,857.10 and 73,287.80 is: 109,784.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,717.20 : 162,857.10 = 73,287.80 : x
  2. Step 2: Convert to fraction form
    108,717.20/162,857.10 = 73,287.80/x
  3. Step 3: Cross multiply
    108,717.20x = 162,857.10 × 73,287.80
  4. Step 4: Simplify right side
    108,717.20x = 11,935,438,573.38
  5. Step 5: Solve for x
    x = 11,935,438,573.38/108,717.20
  6. Step 6: Final answer
    x = 109,784.27

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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.