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Finding the Fourth Proportional to 171,689.56, 257,496.78 and 87,360.28

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Solution

The fourth proportional to 171,689.56, 257,496.78 and 87,360.28 is: 131,021.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,689.56 : 257,496.78 = 87,360.28 : x
  2. Step 2: Convert to fraction form
    171,689.56/257,496.78 = 87,360.28/x
  3. Step 3: Cross multiply
    171,689.56x = 257,496.78 × 87,360.28
  4. Step 4: Simplify right side
    171,689.56x = 22,494,990,799.90
  5. Step 5: Solve for x
    x = 22,494,990,799.90/171,689.56
  6. Step 6: Final answer
    x = 131,021.31

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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.