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Finding the Fourth Proportional to 171,355.28, 256,880.34 and 81,342.46

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Solution

The fourth proportional to 171,355.28, 256,880.34 and 81,342.46 is: 121,941.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,355.28 : 256,880.34 = 81,342.46 : x
  2. Step 2: Convert to fraction form
    171,355.28/256,880.34 = 81,342.46/x
  3. Step 3: Cross multiply
    171,355.28x = 256,880.34 × 81,342.46
  4. Step 4: Simplify right side
    171,355.28x = 20,895,278,781.24
  5. Step 5: Solve for x
    x = 20,895,278,781.24/171,355.28
  6. Step 6: Final answer
    x = 121,941.26

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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.