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Finding the Fourth Proportional to 123,810.23, 170,859.99 and 67,221.60

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Solution

The fourth proportional to 123,810.23, 170,859.99 and 67,221.60 is: 92,766.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,810.23 : 170,859.99 = 67,221.60 : x
  2. Step 2: Convert to fraction form
    123,810.23/170,859.99 = 67,221.60/x
  3. Step 3: Cross multiply
    123,810.23x = 170,859.99 × 67,221.60
  4. Step 4: Simplify right side
    123,810.23x = 11,485,481,903.78
  5. Step 5: Solve for x
    x = 11,485,481,903.78/123,810.23
  6. Step 6: Final answer
    x = 92,766.83

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1.5x scale

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.