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Finding the Fourth Proportional to 128,550.78, 192,835.26 and 39,792.78

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Solution

The fourth proportional to 128,550.78, 192,835.26 and 39,792.78 is: 59,691.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,550.78 : 192,835.26 = 39,792.78 : x
  2. Step 2: Convert to fraction form
    128,550.78/192,835.26 = 39,792.78/x
  3. Step 3: Cross multiply
    128,550.78x = 192,835.26 × 39,792.78
  4. Step 4: Simplify right side
    128,550.78x = 7,673,451,077.42
  5. Step 5: Solve for x
    x = 7,673,451,077.42/128,550.78
  6. Step 6: Final answer
    x = 59,691.98

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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.