Home / 221,097.20-331,715.87-78,939.36

Finding the Fourth Proportional to 221,097.20, 331,715.87 and 78,939.36

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Solution

The fourth proportional to 221,097.20, 331,715.87 and 78,939.36 is: 118,434.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,097.20 : 331,715.87 = 78,939.36 : x
  2. Step 2: Convert to fraction form
    221,097.20/331,715.87 = 78,939.36/x
  3. Step 3: Cross multiply
    221,097.20x = 331,715.87 × 78,939.36
  4. Step 4: Simplify right side
    221,097.20x = 26,185,438,084.95
  5. Step 5: Solve for x
    x = 26,185,438,084.95/221,097.20
  6. Step 6: Final answer
    x = 118,434.06

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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.