Home / 131,830.05-181,893.90-78,105.78

Finding the Fourth Proportional to 131,830.05, 181,893.90 and 78,105.78

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Solution

The fourth proportional to 131,830.05, 181,893.90 and 78,105.78 is: 107,767.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,830.05 : 181,893.90 = 78,105.78 : x
  2. Step 2: Convert to fraction form
    131,830.05/181,893.90 = 78,105.78/x
  3. Step 3: Cross multiply
    131,830.05x = 181,893.90 × 78,105.78
  4. Step 4: Simplify right side
    131,830.05x = 14,206,964,936.74
  5. Step 5: Solve for x
    x = 14,206,964,936.74/131,830.05
  6. Step 6: Final answer
    x = 107,767.27

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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.