Home / 128,987.52-193,431.47-50,091.09

Finding the Fourth Proportional to 128,987.52, 193,431.47 and 50,091.09

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Solution

The fourth proportional to 128,987.52, 193,431.47 and 50,091.09 is: 75,117.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,987.52 : 193,431.47 = 50,091.09 : x
  2. Step 2: Convert to fraction form
    128,987.52/193,431.47 = 50,091.09/x
  3. Step 3: Cross multiply
    128,987.52x = 193,431.47 × 50,091.09
  4. Step 4: Simplify right side
    128,987.52x = 9,689,192,922.15
  5. Step 5: Solve for x
    x = 9,689,192,922.15/128,987.52
  6. Step 6: Final answer
    x = 75,117.29

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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.