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Finding the Fourth Proportional to 179,611.20, 269,449.20 and 90,640.80

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Solution

The fourth proportional to 179,611.20, 269,449.20 and 90,640.80 is: 135,977.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    179,611.20 : 269,449.20 = 90,640.80 : x
  2. Step 2: Convert to fraction form
    179,611.20/269,449.20 = 90,640.80/x
  3. Step 3: Cross multiply
    179,611.20x = 269,449.20 × 90,640.80
  4. Step 4: Simplify right side
    179,611.20x = 24,423,091,047.36
  5. Step 5: Solve for x
    x = 24,423,091,047.36/179,611.20
  6. Step 6: Final answer
    x = 135,977.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.