Home / 131,505.60-196,999.20-78,758.40

Finding the Fourth Proportional to 131,505.60, 196,999.20 and 78,758.40

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Solution

The fourth proportional to 131,505.60, 196,999.20 and 78,758.40 is: 117,982.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,505.60 : 196,999.20 = 78,758.40 : x
  2. Step 2: Convert to fraction form
    131,505.60/196,999.20 = 78,758.40/x
  3. Step 3: Cross multiply
    131,505.60x = 196,999.20 × 78,758.40
  4. Step 4: Simplify right side
    131,505.60x = 15,515,341,793.28
  5. Step 5: Solve for x
    x = 15,515,341,793.28/131,505.60
  6. Step 6: Final answer
    x = 117,982.37

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1.5x scale

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.