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Finding the Fourth Proportional to 80,124.48, 120,153.91 and 35,720.86

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Solution

The fourth proportional to 80,124.48, 120,153.91 and 35,720.86 is: 53,566.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,124.48 : 120,153.91 = 35,720.86 : x
  2. Step 2: Convert to fraction form
    80,124.48/120,153.91 = 35,720.86/x
  3. Step 3: Cross multiply
    80,124.48x = 120,153.91 × 35,720.86
  4. Step 4: Simplify right side
    80,124.48x = 4,292,000,997.56
  5. Step 5: Solve for x
    x = 4,292,000,997.56/80,124.48
  6. Step 6: Final answer
    x = 53,566.66

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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.