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Finding the Fourth Proportional to 330,867.20, 496,300.80 and 81,549.20

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Solution

The fourth proportional to 330,867.20, 496,300.80 and 81,549.20 is: 122,323.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,867.20 : 496,300.80 = 81,549.20 : x
  2. Step 2: Convert to fraction form
    330,867.20/496,300.80 = 81,549.20/x
  3. Step 3: Cross multiply
    330,867.20x = 496,300.80 × 81,549.20
  4. Step 4: Simplify right side
    330,867.20x = 40,472,933,199.36
  5. Step 5: Solve for x
    x = 40,472,933,199.36/330,867.20
  6. Step 6: Final answer
    x = 122,323.80

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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.