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Finding the Fourth Proportional to 123,783.91, 170,821.65 and 67,195.29

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Solution

The fourth proportional to 123,783.91, 170,821.65 and 67,195.29 is: 92,729.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,783.91 : 170,821.65 = 67,195.29 : x
  2. Step 2: Convert to fraction form
    123,783.91/170,821.65 = 67,195.29/x
  3. Step 3: Cross multiply
    123,783.91x = 170,821.65 × 67,195.29
  4. Step 4: Simplify right side
    123,783.91x = 11,478,410,310.03
  5. Step 5: Solve for x
    x = 11,478,410,310.03/123,783.91
  6. Step 6: Final answer
    x = 92,729.42

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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.