Home / 138,857.90-208,296.56-68,718.38

Finding the Fourth Proportional to 138,857.90, 208,296.56 and 68,718.38

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Solution

The fourth proportional to 138,857.90, 208,296.56 and 68,718.38 is: 103,082.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,857.90 : 208,296.56 = 68,718.38 : x
  2. Step 2: Convert to fraction form
    138,857.90/208,296.56 = 68,718.38/x
  3. Step 3: Cross multiply
    138,857.90x = 208,296.56 × 68,718.38
  4. Step 4: Simplify right side
    138,857.90x = 14,313,801,293.09
  5. Step 5: Solve for x
    x = 14,313,801,293.09/138,857.90
  6. Step 6: Final answer
    x = 103,082.37

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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.