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Finding the Fourth Proportional to 123,283.39, 170,129.41 and 68,836.40

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Solution

The fourth proportional to 123,283.39, 170,129.41 and 68,836.40 is: 94,993.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,283.39 : 170,129.41 = 68,836.40 : x
  2. Step 2: Convert to fraction form
    123,283.39/170,129.41 = 68,836.40/x
  3. Step 3: Cross multiply
    123,283.39x = 170,129.41 × 68,836.40
  4. Step 4: Simplify right side
    123,283.39x = 11,711,096,118.52
  5. Step 5: Solve for x
    x = 11,711,096,118.52/123,283.39
  6. Step 6: Final answer
    x = 94,993.30

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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.