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Finding the Fourth Proportional to 270,387.41, 405,639.30 and 80,862.80

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Solution

The fourth proportional to 270,387.41, 405,639.30 and 80,862.80 is: 121,311.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,387.41 : 405,639.30 = 80,862.80 : x
  2. Step 2: Convert to fraction form
    270,387.41/405,639.30 = 80,862.80/x
  3. Step 3: Cross multiply
    270,387.41x = 405,639.30 × 80,862.80
  4. Step 4: Simplify right side
    270,387.41x = 32,801,129,588.04
  5. Step 5: Solve for x
    x = 32,801,129,588.04/270,387.41
  6. Step 6: Final answer
    x = 121,311.60

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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.