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Finding the Fourth Proportional to 139,320.92, 192,293.46 and 91,578.68

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Solution

The fourth proportional to 139,320.92, 192,293.46 and 91,578.68 is: 126,398.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,320.92 : 192,293.46 = 91,578.68 : x
  2. Step 2: Convert to fraction form
    139,320.92/192,293.46 = 91,578.68/x
  3. Step 3: Cross multiply
    139,320.92x = 192,293.46 × 91,578.68
  4. Step 4: Simplify right side
    139,320.92x = 17,609,981,239.43
  5. Step 5: Solve for x
    x = 17,609,981,239.43/139,320.92
  6. Step 6: Final answer
    x = 126,398.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.