Home / 131,453.10-196,920.45-78,705.90

Finding the Fourth Proportional to 131,453.10, 196,920.45 and 78,705.90

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Solution

The fourth proportional to 131,453.10, 196,920.45 and 78,705.90 is: 117,903.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,453.10 : 196,920.45 = 78,705.90 : x
  2. Step 2: Convert to fraction form
    131,453.10/196,920.45 = 78,705.90/x
  3. Step 3: Cross multiply
    131,453.10x = 196,920.45 × 78,705.90
  4. Step 4: Simplify right side
    131,453.10x = 15,498,801,245.66
  5. Step 5: Solve for x
    x = 15,498,801,245.66/131,453.10
  6. Step 6: Final answer
    x = 117,903.66

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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.