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Finding the Fourth Proportional to 262,163.20, 393,244.80 and 72,623.20

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Solution

The fourth proportional to 262,163.20, 393,244.80 and 72,623.20 is: 108,934.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,163.20 : 393,244.80 = 72,623.20 : x
  2. Step 2: Convert to fraction form
    262,163.20/393,244.80 = 72,623.20/x
  3. Step 3: Cross multiply
    262,163.20x = 393,244.80 × 72,623.20
  4. Step 4: Simplify right side
    262,163.20x = 28,558,695,759.36
  5. Step 5: Solve for x
    x = 28,558,695,759.36/262,163.20
  6. Step 6: Final answer
    x = 108,934.80

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Similar ratio
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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.