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Finding the Fourth Proportional to 267,903.20, 401,708.80 and 80,890.40

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Solution

The fourth proportional to 267,903.20, 401,708.80 and 80,890.40 is: 121,291.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,903.20 : 401,708.80 = 80,890.40 : x
  2. Step 2: Convert to fraction form
    267,903.20/401,708.80 = 80,890.40/x
  3. Step 3: Cross multiply
    267,903.20x = 401,708.80 × 80,890.40
  4. Step 4: Simplify right side
    267,903.20x = 32,494,385,515.52
  5. Step 5: Solve for x
    x = 32,494,385,515.52/267,903.20
  6. Step 6: Final answer
    x = 121,291.52

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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.