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Finding the Fourth Proportional to 267,918.20, 401,731.30 and 80,905.40

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Solution

The fourth proportional to 267,918.20, 401,731.30 and 80,905.40 is: 121,314.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,918.20 : 401,731.30 = 80,905.40 : x
  2. Step 2: Convert to fraction form
    267,918.20/401,731.30 = 80,905.40/x
  3. Step 3: Cross multiply
    267,918.20x = 401,731.30 × 80,905.40
  4. Step 4: Simplify right side
    267,918.20x = 32,502,231,519.02
  5. Step 5: Solve for x
    x = 32,502,231,519.02/267,918.20
  6. Step 6: Final answer
    x = 121,314.01

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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.