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Finding the Fourth Proportional to 80,960.76, 121,411.99 and 34,217.28

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Solution

The fourth proportional to 80,960.76, 121,411.99 and 34,217.28 is: 51,313.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,960.76 : 121,411.99 = 34,217.28 : x
  2. Step 2: Convert to fraction form
    80,960.76/121,411.99 = 34,217.28/x
  3. Step 3: Cross multiply
    80,960.76x = 121,411.99 × 34,217.28
  4. Step 4: Simplify right side
    80,960.76x = 4,154,388,057.19
  5. Step 5: Solve for x
    x = 4,154,388,057.19/80,960.76
  6. Step 6: Final answer
    x = 51,313.60

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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.