Home / 100,939.20-151,279.20-89,793.60

Finding the Fourth Proportional to 100,939.20, 151,279.20 and 89,793.60

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Solution

The fourth proportional to 100,939.20, 151,279.20 and 89,793.60 is: 134,575.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,939.20 : 151,279.20 = 89,793.60 : x
  2. Step 2: Convert to fraction form
    100,939.20/151,279.20 = 89,793.60/x
  3. Step 3: Cross multiply
    100,939.20x = 151,279.20 × 89,793.60
  4. Step 4: Simplify right side
    100,939.20x = 13,583,903,973.12
  5. Step 5: Solve for x
    x = 13,583,903,973.12/100,939.20
  6. Step 6: Final answer
    x = 134,575.11

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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.