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Finding the Fourth Proportional to 139,357, 192,316.17 and 75,694.78

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Solution

The fourth proportional to 139,357, 192,316.17 and 75,694.78 is: 104,460.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,357 : 192,316.17 = 75,694.78 : x
  2. Step 2: Convert to fraction form
    139,357/192,316.17 = 75,694.78/x
  3. Step 3: Cross multiply
    139,357x = 192,316.17 × 75,694.78
  4. Step 4: Simplify right side
    139,357x = 14,557,330,178.59
  5. Step 5: Solve for x
    x = 14,557,330,178.59/139,357
  6. Step 6: Final answer
    x = 104,460.70

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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.