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Finding the Fourth Proportional to 139,719.74, 192,814.43 and 76,057.38

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Solution

The fourth proportional to 139,719.74, 192,814.43 and 76,057.38 is: 104,959.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,719.74 : 192,814.43 = 76,057.38 : x
  2. Step 2: Convert to fraction form
    139,719.74/192,814.43 = 76,057.38/x
  3. Step 3: Cross multiply
    139,719.74x = 192,814.43 × 76,057.38
  4. Step 4: Simplify right side
    139,719.74x = 14,664,959,991.71
  5. Step 5: Solve for x
    x = 14,664,959,991.71/139,719.74
  6. Step 6: Final answer
    x = 104,959.83

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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.