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Finding the Fourth Proportional to 268,936.80, 403,405.20 and 121,480.80

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Solution

The fourth proportional to 268,936.80, 403,405.20 and 121,480.80 is: 182,221.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,936.80 : 403,405.20 = 121,480.80 : x
  2. Step 2: Convert to fraction form
    268,936.80/403,405.20 = 121,480.80/x
  3. Step 3: Cross multiply
    268,936.80x = 403,405.20 × 121,480.80
  4. Step 4: Simplify right side
    268,936.80x = 49,005,986,420.16
  5. Step 5: Solve for x
    x = 49,005,986,420.16/268,936.80
  6. Step 6: Final answer
    x = 182,221.20

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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.