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Finding the Fourth Proportional to 101,615.40, 152,163.90 and 80,879.40

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Solution

The fourth proportional to 101,615.40, 152,163.90 and 80,879.40 is: 121,112.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,615.40 : 152,163.90 = 80,879.40 : x
  2. Step 2: Convert to fraction form
    101,615.40/152,163.90 = 80,879.40/x
  3. Step 3: Cross multiply
    101,615.40x = 152,163.90 × 80,879.40
  4. Step 4: Simplify right side
    101,615.40x = 12,306,924,933.66
  5. Step 5: Solve for x
    x = 12,306,924,933.66/101,615.40
  6. Step 6: Final answer
    x = 121,112.79

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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.