Home / 131,115.90-196,558.65-78,546.30

Finding the Fourth Proportional to 131,115.90, 196,558.65 and 78,546.30

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Solution

The fourth proportional to 131,115.90, 196,558.65 and 78,546.30 is: 117,750.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,115.90 : 196,558.65 = 78,546.30 : x
  2. Step 2: Convert to fraction form
    131,115.90/196,558.65 = 78,546.30/x
  3. Step 3: Cross multiply
    131,115.90x = 196,558.65 × 78,546.30
  4. Step 4: Simplify right side
    131,115.90x = 15,438,954,690.50
  5. Step 5: Solve for x
    x = 15,438,954,690.50/131,115.90
  6. Step 6: Final answer
    x = 117,750.44

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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.