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Finding the Fourth Proportional to 86,129.28, 129,201.30 and 23,799.78

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Solution

The fourth proportional to 86,129.28, 129,201.30 and 23,799.78 is: 35,701.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,129.28 : 129,201.30 = 23,799.78 : x
  2. Step 2: Convert to fraction form
    86,129.28/129,201.30 = 23,799.78/x
  3. Step 3: Cross multiply
    86,129.28x = 129,201.30 × 23,799.78
  4. Step 4: Simplify right side
    86,129.28x = 3,074,962,515.71
  5. Step 5: Solve for x
    x = 3,074,962,515.71/86,129.28
  6. Step 6: Final answer
    x = 35,701.71

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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.