Home / 188,131.20-281,759.40-128,644.80

Finding the Fourth Proportional to 188,131.20, 281,759.40 and 128,644.80

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Solution

The fourth proportional to 188,131.20, 281,759.40 and 128,644.80 is: 192,668.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,131.20 : 281,759.40 = 128,644.80 : x
  2. Step 2: Convert to fraction form
    188,131.20/281,759.40 = 128,644.80/x
  3. Step 3: Cross multiply
    188,131.20x = 281,759.40 × 128,644.80
  4. Step 4: Simplify right side
    188,131.20x = 36,246,881,661.12
  5. Step 5: Solve for x
    x = 36,246,881,661.12/188,131.20
  6. Step 6: Final answer
    x = 192,668.10

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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.