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Finding the Fourth Proportional to 123,940.80, 171,370.08 and 108,194.40

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Solution

The fourth proportional to 123,940.80, 171,370.08 and 108,194.40 is: 149,597.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,940.80 : 171,370.08 = 108,194.40 : x
  2. Step 2: Convert to fraction form
    123,940.80/171,370.08 = 108,194.40/x
  3. Step 3: Cross multiply
    123,940.80x = 171,370.08 × 108,194.40
  4. Step 4: Simplify right side
    123,940.80x = 18,541,282,983.55
  5. Step 5: Solve for x
    x = 18,541,282,983.55/123,940.80
  6. Step 6: Final answer
    x = 149,597.90

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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.