Home / 131,310.90-197,112.15-81,447.30

Finding the Fourth Proportional to 131,310.90, 197,112.15 and 81,447.30

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Solution

The fourth proportional to 131,310.90, 197,112.15 and 81,447.30 is: 122,261.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,310.90 : 197,112.15 = 81,447.30 : x
  2. Step 2: Convert to fraction form
    131,310.90/197,112.15 = 81,447.30/x
  3. Step 3: Cross multiply
    131,310.90x = 197,112.15 × 81,447.30
  4. Step 4: Simplify right side
    131,310.90x = 16,054,252,414.70
  5. Step 5: Solve for x
    x = 16,054,252,414.70/131,310.90
  6. Step 6: Final answer
    x = 122,261.38

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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.