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Finding the Fourth Proportional to 70,744.70, 106,080.52 and 20,818.31

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Solution

The fourth proportional to 70,744.70, 106,080.52 and 20,818.31 is: 31,216.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,744.70 : 106,080.52 = 20,818.31 : x
  2. Step 2: Convert to fraction form
    70,744.70/106,080.52 = 20,818.31/x
  3. Step 3: Cross multiply
    70,744.70x = 106,080.52 × 20,818.31
  4. Step 4: Simplify right side
    70,744.70x = 2,208,416,515.83
  5. Step 5: Solve for x
    x = 2,208,416,515.83/70,744.70
  6. Step 6: Final answer
    x = 31,216.71

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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.