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Finding the Fourth Proportional to 171,432.39, 257,128.11 and 45,082.48

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Solution

The fourth proportional to 171,432.39, 257,128.11 and 45,082.48 is: 67,618.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,432.39 : 257,128.11 = 45,082.48 : x
  2. Step 2: Convert to fraction form
    171,432.39/257,128.11 = 45,082.48/x
  3. Step 3: Cross multiply
    171,432.39x = 257,128.11 × 45,082.48
  4. Step 4: Simplify right side
    171,432.39x = 11,591,972,876.51
  5. Step 5: Solve for x
    x = 11,591,972,876.51/171,432.39
  6. Step 6: Final answer
    x = 67,618.34

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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.