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Finding the Fourth Proportional to 128,735.55, 193,103.33 and 119,987.55

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Solution

The fourth proportional to 128,735.55, 193,103.33 and 119,987.55 is: 179,981.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,735.55 : 193,103.33 = 119,987.55 : x
  2. Step 2: Convert to fraction form
    128,735.55/193,103.33 = 119,987.55/x
  3. Step 3: Cross multiply
    128,735.55x = 193,103.33 × 119,987.55
  4. Step 4: Simplify right side
    128,735.55x = 23,169,994,863.60
  5. Step 5: Solve for x
    x = 23,169,994,863.60/128,735.55
  6. Step 6: Final answer
    x = 179,981.33

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Similar ratio
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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.