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Finding the Fourth Proportional to 123,449.12, 170,200.68 and 100,764.80

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Solution

The fourth proportional to 123,449.12, 170,200.68 and 100,764.80 is: 138,925.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,449.12 : 170,200.68 = 100,764.80 : x
  2. Step 2: Convert to fraction form
    123,449.12/170,200.68 = 100,764.80/x
  3. Step 3: Cross multiply
    123,449.12x = 170,200.68 × 100,764.80
  4. Step 4: Simplify right side
    123,449.12x = 17,150,237,480.06
  5. Step 5: Solve for x
    x = 17,150,237,480.06/123,449.12
  6. Step 6: Final answer
    x = 138,925.55

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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.