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Finding the Fourth Proportional to 123,699.39, 170,628.44 and 108,580.11

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Solution

The fourth proportional to 123,699.39, 170,628.44 and 108,580.11 is: 149,773.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,699.39 : 170,628.44 = 108,580.11 : x
  2. Step 2: Convert to fraction form
    123,699.39/170,628.44 = 108,580.11/x
  3. Step 3: Cross multiply
    123,699.39x = 170,628.44 × 108,580.11
  4. Step 4: Simplify right side
    123,699.39x = 18,526,854,241.43
  5. Step 5: Solve for x
    x = 18,526,854,241.43/123,699.39
  6. Step 6: Final answer
    x = 149,773.21

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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.