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Finding the Fourth Proportional to 123,628.49, 170,608.39 and 67,039.87

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Solution

The fourth proportional to 123,628.49, 170,608.39 and 67,039.87 is: 92,515.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,628.49 : 170,608.39 = 67,039.87 : x
  2. Step 2: Convert to fraction form
    123,628.49/170,608.39 = 67,039.87/x
  3. Step 3: Cross multiply
    123,628.49x = 170,608.39 × 67,039.87
  4. Step 4: Simplify right side
    123,628.49x = 11,437,564,286.51
  5. Step 5: Solve for x
    x = 11,437,564,286.51/123,628.49
  6. Step 6: Final answer
    x = 92,515.60

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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.