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Finding the Fourth Proportional to 123,980.63, 171,093.87 and 67,392

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Solution

The fourth proportional to 123,980.63, 171,093.87 and 67,392 is: 93,001.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,980.63 : 171,093.87 = 67,392 : x
  2. Step 2: Convert to fraction form
    123,980.63/171,093.87 = 67,392/x
  3. Step 3: Cross multiply
    123,980.63x = 171,093.87 × 67,392
  4. Step 4: Simplify right side
    123,980.63x = 11,530,358,087.04
  5. Step 5: Solve for x
    x = 11,530,358,087.04/123,980.63
  6. Step 6: Final answer
    x = 93,001.29

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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.