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Finding the Fourth Proportional to 192,512.64, 288,788.76 and 72,670.54

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Solution

The fourth proportional to 192,512.64, 288,788.76 and 72,670.54 is: 109,013.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,512.64 : 288,788.76 = 72,670.54 : x
  2. Step 2: Convert to fraction form
    192,512.64/288,788.76 = 72,670.54/x
  3. Step 3: Cross multiply
    192,512.64x = 288,788.76 × 72,670.54
  4. Step 4: Simplify right side
    192,512.64x = 20,986,435,135.13
  5. Step 5: Solve for x
    x = 20,986,435,135.13/192,512.64
  6. Step 6: Final answer
    x = 109,013.28

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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.