Home / 138,923.10-208,093.05-76,520.70

Finding the Fourth Proportional to 138,923.10, 208,093.05 and 76,520.70

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Solution

The fourth proportional to 138,923.10, 208,093.05 and 76,520.70 is: 114,620.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,923.10 : 208,093.05 = 76,520.70 : x
  2. Step 2: Convert to fraction form
    138,923.10/208,093.05 = 76,520.70/x
  3. Step 3: Cross multiply
    138,923.10x = 208,093.05 × 76,520.70
  4. Step 4: Simplify right side
    138,923.10x = 15,923,425,851.14
  5. Step 5: Solve for x
    x = 15,923,425,851.14/138,923.10
  6. Step 6: Final answer
    x = 114,620.43

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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.