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Finding the Fourth Proportional to 70,819.21, 106,229.18 and 28,700.11

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Solution

The fourth proportional to 70,819.21, 106,229.18 and 28,700.11 is: 43,050.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,819.21 : 106,229.18 = 28,700.11 : x
  2. Step 2: Convert to fraction form
    70,819.21/106,229.18 = 28,700.11/x
  3. Step 3: Cross multiply
    70,819.21x = 106,229.18 × 28,700.11
  4. Step 4: Simplify right side
    70,819.21x = 3,048,789,151.21
  5. Step 5: Solve for x
    x = 3,048,789,151.21/70,819.21
  6. Step 6: Final answer
    x = 43,050.31

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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.