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Finding the Fourth Proportional to 70,910.47, 106,382.68 and 20,310.21

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Solution

The fourth proportional to 70,910.47, 106,382.68 and 20,310.21 is: 30,470.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,910.47 : 106,382.68 = 20,310.21 : x
  2. Step 2: Convert to fraction form
    70,910.47/106,382.68 = 20,310.21/x
  3. Step 3: Cross multiply
    70,910.47x = 106,382.68 × 20,310.21
  4. Step 4: Simplify right side
    70,910.47x = 2,160,654,571.16
  5. Step 5: Solve for x
    x = 2,160,654,571.16/70,910.47
  6. Step 6: Final answer
    x = 30,470.18

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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.