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Finding the Fourth Proportional to 123,809.15, 170,856.61 and 67,220.52

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Solution

The fourth proportional to 123,809.15, 170,856.61 and 67,220.52 is: 92,764.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,809.15 : 170,856.61 = 67,220.52 : x
  2. Step 2: Convert to fraction form
    123,809.15/170,856.61 = 67,220.52/x
  3. Step 3: Cross multiply
    123,809.15x = 170,856.61 × 67,220.52
  4. Step 4: Simplify right side
    123,809.15x = 11,485,070,169.64
  5. Step 5: Solve for x
    x = 11,485,070,169.64/123,809.15
  6. Step 6: Final answer
    x = 92,764.31

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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.