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Finding the Fourth Proportional to 140,144.58, 193,404.87 and 79,720.83

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Solution

The fourth proportional to 140,144.58, 193,404.87 and 79,720.83 is: 110,017.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,144.58 : 193,404.87 = 79,720.83 : x
  2. Step 2: Convert to fraction form
    140,144.58/193,404.87 = 79,720.83/x
  3. Step 3: Cross multiply
    140,144.58x = 193,404.87 × 79,720.83
  4. Step 4: Simplify right side
    140,144.58x = 15,418,396,762.44
  5. Step 5: Solve for x
    x = 15,418,396,762.44/140,144.58
  6. Step 6: Final answer
    x = 110,017.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.