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Finding the Fourth Proportional to 170,644.26, 255,767.06 and 128,388.56

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Solution

The fourth proportional to 170,644.26, 255,767.06 and 128,388.56 is: 192,432.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,644.26 : 255,767.06 = 128,388.56 : x
  2. Step 2: Convert to fraction form
    170,644.26/255,767.06 = 128,388.56/x
  3. Step 3: Cross multiply
    170,644.26x = 255,767.06 × 128,388.56
  4. Step 4: Simplify right side
    170,644.26x = 32,837,564,528.83
  5. Step 5: Solve for x
    x = 32,837,564,528.83/170,644.26
  6. Step 6: Final answer
    x = 192,432.87

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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.