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Finding the Fourth Proportional to 486,167.76, 729,251.64 and 131,181.78

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Solution

The fourth proportional to 486,167.76, 729,251.64 and 131,181.78 is: 196,772.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,167.76 : 729,251.64 = 131,181.78 : x
  2. Step 2: Convert to fraction form
    486,167.76/729,251.64 = 131,181.78/x
  3. Step 3: Cross multiply
    486,167.76x = 729,251.64 × 131,181.78
  4. Step 4: Simplify right side
    486,167.76x = 95,664,528,203.12
  5. Step 5: Solve for x
    x = 95,664,528,203.12/486,167.76
  6. Step 6: Final answer
    x = 196,772.67

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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.