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Finding the Fourth Proportional to 138,887.31, 208,053.46 and 63,904.65

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Solution

The fourth proportional to 138,887.31, 208,053.46 and 63,904.65 is: 95,729.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,887.31 : 208,053.46 = 63,904.65 : x
  2. Step 2: Convert to fraction form
    138,887.31/208,053.46 = 63,904.65/x
  3. Step 3: Cross multiply
    138,887.31x = 208,053.46 × 63,904.65
  4. Step 4: Simplify right side
    138,887.31x = 13,295,582,842.27
  5. Step 5: Solve for x
    x = 13,295,582,842.27/138,887.31
  6. Step 6: Final answer
    x = 95,729.29

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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.