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Finding the Fourth Proportional to 136,620.80, 188,551.20 and 80,079.68

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Solution

The fourth proportional to 136,620.80, 188,551.20 and 80,079.68 is: 110,518.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,620.80 : 188,551.20 = 80,079.68 : x
  2. Step 2: Convert to fraction form
    136,620.80/188,551.20 = 80,079.68/x
  3. Step 3: Cross multiply
    136,620.80x = 188,551.20 × 80,079.68
  4. Step 4: Simplify right side
    136,620.80x = 15,099,119,759.62
  5. Step 5: Solve for x
    x = 15,099,119,759.62/136,620.80
  6. Step 6: Final answer
    x = 110,518.46

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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.