Home / 139,229.28-192,120.05-77,979.31

Finding the Fourth Proportional to 139,229.28, 192,120.05 and 77,979.31

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Solution

The fourth proportional to 139,229.28, 192,120.05 and 77,979.31 is: 107,602.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,229.28 : 192,120.05 = 77,979.31 : x
  2. Step 2: Convert to fraction form
    139,229.28/192,120.05 = 77,979.31/x
  3. Step 3: Cross multiply
    139,229.28x = 192,120.05 × 77,979.31
  4. Step 4: Simplify right side
    139,229.28x = 14,981,388,650.81
  5. Step 5: Solve for x
    x = 14,981,388,650.81/139,229.28
  6. Step 6: Final answer
    x = 107,602.28

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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.