Home / 128,126.21-192,207.68-39,387.16

Finding the Fourth Proportional to 128,126.21, 192,207.68 and 39,387.16

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Solution

The fourth proportional to 128,126.21, 192,207.68 and 39,387.16 is: 59,086.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,126.21 : 192,207.68 = 39,387.16 : x
  2. Step 2: Convert to fraction form
    128,126.21/192,207.68 = 39,387.16/x
  3. Step 3: Cross multiply
    128,126.21x = 192,207.68 × 39,387.16
  4. Step 4: Simplify right side
    128,126.21x = 7,570,514,645.39
  5. Step 5: Solve for x
    x = 7,570,514,645.39/128,126.21
  6. Step 6: Final answer
    x = 59,086.39

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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.