Home / 142,781.44-197,039.84-79,120.64

Finding the Fourth Proportional to 142,781.44, 197,039.84 and 79,120.64

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Solution

The fourth proportional to 142,781.44, 197,039.84 and 79,120.64 is: 109,187.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,781.44 : 197,039.84 = 79,120.64 : x
  2. Step 2: Convert to fraction form
    142,781.44/197,039.84 = 79,120.64/x
  3. Step 3: Cross multiply
    142,781.44x = 197,039.84 × 79,120.64
  4. Step 4: Simplify right side
    142,781.44x = 15,589,918,246.30
  5. Step 5: Solve for x
    x = 15,589,918,246.30/142,781.44
  6. Step 6: Final answer
    x = 109,187.29

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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.