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Finding the Fourth Proportional to 123,699.64, 170,628.78 and 108,580.36

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Solution

The fourth proportional to 123,699.64, 170,628.78 and 108,580.36 is: 149,773.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,699.64 : 170,628.78 = 108,580.36 : x
  2. Step 2: Convert to fraction form
    123,699.64/170,628.78 = 108,580.36/x
  3. Step 3: Cross multiply
    123,699.64x = 170,628.78 × 108,580.36
  4. Step 4: Simplify right side
    123,699.64x = 18,526,934,358.76
  5. Step 5: Solve for x
    x = 18,526,934,358.76/123,699.64
  6. Step 6: Final answer
    x = 149,773.55

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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.