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Finding the Fourth Proportional to 70,989.62, 106,525.13 and 28,861.92

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Solution

The fourth proportional to 70,989.62, 106,525.13 and 28,861.92 is: 43,309.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,989.62 : 106,525.13 = 28,861.92 : x
  2. Step 2: Convert to fraction form
    70,989.62/106,525.13 = 28,861.92/x
  3. Step 3: Cross multiply
    70,989.62x = 106,525.13 × 28,861.92
  4. Step 4: Simplify right side
    70,989.62x = 3,074,519,635.74
  5. Step 5: Solve for x
    x = 3,074,519,635.74/70,989.62
  6. Step 6: Final answer
    x = 43,309.43

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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.