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Finding the Fourth Proportional to 333,811.20, 500,709.70 and 81,092.88

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Solution

The fourth proportional to 333,811.20, 500,709.70 and 81,092.88 is: 121,637.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    333,811.20 : 500,709.70 = 81,092.88 : x
  2. Step 2: Convert to fraction form
    333,811.20/500,709.70 = 81,092.88/x
  3. Step 3: Cross multiply
    333,811.20x = 500,709.70 × 81,092.88
  4. Step 4: Simplify right side
    333,811.20x = 40,603,991,616.94
  5. Step 5: Solve for x
    x = 40,603,991,616.94/333,811.20
  6. Step 6: Final answer
    x = 121,637.60

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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.