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Finding the Fourth Proportional to 171,109.40, 256,664.10 and 71,236.40

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Solution

The fourth proportional to 171,109.40, 256,664.10 and 71,236.40 is: 106,854.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,109.40 : 256,664.10 = 71,236.40 : x
  2. Step 2: Convert to fraction form
    171,109.40/256,664.10 = 71,236.40/x
  3. Step 3: Cross multiply
    171,109.40x = 256,664.10 × 71,236.40
  4. Step 4: Simplify right side
    171,109.40x = 18,283,826,493.24
  5. Step 5: Solve for x
    x = 18,283,826,493.24/171,109.40
  6. Step 6: Final answer
    x = 106,854.60

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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.