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Finding the Fourth Proportional to 128,387.32, 192,531.22 and 44,131.64

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Solution

The fourth proportional to 128,387.32, 192,531.22 and 44,131.64 is: 66,180.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,387.32 : 192,531.22 = 44,131.64 : x
  2. Step 2: Convert to fraction form
    128,387.32/192,531.22 = 44,131.64/x
  3. Step 3: Cross multiply
    128,387.32x = 192,531.22 × 44,131.64
  4. Step 4: Simplify right side
    128,387.32x = 8,496,718,489.80
  5. Step 5: Solve for x
    x = 8,496,718,489.80/128,387.32
  6. Step 6: Final answer
    x = 66,180.36

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1.5x scale

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.