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Finding the Fourth Proportional to 208,201.96, 287,344.74 and 123,351.40

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Solution

The fourth proportional to 208,201.96, 287,344.74 and 123,351.40 is: 170,240.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,201.96 : 287,344.74 = 123,351.40 : x
  2. Step 2: Convert to fraction form
    208,201.96/287,344.74 = 123,351.40/x
  3. Step 3: Cross multiply
    208,201.96x = 287,344.74 × 123,351.40
  4. Step 4: Simplify right side
    208,201.96x = 35,444,375,961.64
  5. Step 5: Solve for x
    x = 35,444,375,961.64/208,201.96
  6. Step 6: Final answer
    x = 170,240.36

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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.