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Finding the Fourth Proportional to 208,593.93, 287,906.63 and 122,580.56

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Solution

The fourth proportional to 208,593.93, 287,906.63 and 122,580.56 is: 169,188.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,593.93 : 287,906.63 = 122,580.56 : x
  2. Step 2: Convert to fraction form
    208,593.93/287,906.63 = 122,580.56/x
  3. Step 3: Cross multiply
    208,593.93x = 287,906.63 × 122,580.56
  4. Step 4: Simplify right side
    208,593.93x = 35,291,753,880.68
  5. Step 5: Solve for x
    x = 35,291,753,880.68/208,593.93
  6. Step 6: Final answer
    x = 169,188.79

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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.