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Finding the Fourth Proportional to 128,506.34, 192,772.41 and 44,255.40

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Solution

The fourth proportional to 128,506.34, 192,772.41 and 44,255.40 is: 66,387.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,506.34 : 192,772.41 = 44,255.40 : x
  2. Step 2: Convert to fraction form
    128,506.34/192,772.41 = 44,255.40/x
  3. Step 3: Cross multiply
    128,506.34x = 192,772.41 × 44,255.40
  4. Step 4: Simplify right side
    128,506.34x = 8,531,220,113.51
  5. Step 5: Solve for x
    x = 8,531,220,113.51/128,506.34
  6. Step 6: Final answer
    x = 66,387.55

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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.