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Finding the Fourth Proportional to 268,821.60, 403,232.40 and 81,808.80

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Solution

The fourth proportional to 268,821.60, 403,232.40 and 81,808.80 is: 122,713.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,821.60 : 403,232.40 = 81,808.80 : x
  2. Step 2: Convert to fraction form
    268,821.60/403,232.40 = 81,808.80/x
  3. Step 3: Cross multiply
    268,821.60x = 403,232.40 × 81,808.80
  4. Step 4: Simplify right side
    268,821.60x = 32,987,958,765.12
  5. Step 5: Solve for x
    x = 32,987,958,765.12/268,821.60
  6. Step 6: Final answer
    x = 122,713.20

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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.