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Finding the Fourth Proportional to 123,305.68, 170,116.32 and 80,921.80

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Solution

The fourth proportional to 123,305.68, 170,116.32 and 80,921.80 is: 111,642.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,305.68 : 170,116.32 = 80,921.80 : x
  2. Step 2: Convert to fraction form
    123,305.68/170,116.32 = 80,921.80/x
  3. Step 3: Cross multiply
    123,305.68x = 170,116.32 × 80,921.80
  4. Step 4: Simplify right side
    123,305.68x = 13,766,118,823.78
  5. Step 5: Solve for x
    x = 13,766,118,823.78/123,305.68
  6. Step 6: Final answer
    x = 111,642.21

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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.