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Finding the Fourth Proportional to 267,315.71, 400,978.62 and 87,401.21

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Solution

The fourth proportional to 267,315.71, 400,978.62 and 87,401.21 is: 131,103.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,315.71 : 400,978.62 = 87,401.21 : x
  2. Step 2: Convert to fraction form
    267,315.71/400,978.62 = 87,401.21/x
  3. Step 3: Cross multiply
    267,315.71x = 400,978.62 × 87,401.21
  4. Step 4: Simplify right side
    267,315.71x = 35,046,014,567.24
  5. Step 5: Solve for x
    x = 35,046,014,567.24/267,315.71
  6. Step 6: Final answer
    x = 131,103.46

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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.