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Finding the Fourth Proportional to 84,019.38, 126,025.81 and 20,839.66

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Solution

The fourth proportional to 84,019.38, 126,025.81 and 20,839.66 is: 31,258.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,019.38 : 126,025.81 = 20,839.66 : x
  2. Step 2: Convert to fraction form
    84,019.38/126,025.81 = 20,839.66/x
  3. Step 3: Cross multiply
    84,019.38x = 126,025.81 × 20,839.66
  4. Step 4: Simplify right side
    84,019.38x = 2,626,335,031.62
  5. Step 5: Solve for x
    x = 2,626,335,031.62/84,019.38
  6. Step 6: Final answer
    x = 31,258.68

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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.