Home / 138,936.94-208,234.42-79,015.70

Finding the Fourth Proportional to 138,936.94, 208,234.42 and 79,015.70

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Solution

The fourth proportional to 138,936.94, 208,234.42 and 79,015.70 is: 118,426.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,936.94 : 208,234.42 = 79,015.70 : x
  2. Step 2: Convert to fraction form
    138,936.94/208,234.42 = 79,015.70/x
  3. Step 3: Cross multiply
    138,936.94x = 208,234.42 × 79,015.70
  4. Step 4: Simplify right side
    138,936.94x = 16,453,788,460.39
  5. Step 5: Solve for x
    x = 16,453,788,460.39/138,936.94
  6. Step 6: Final answer
    x = 118,426.31

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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.