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Finding the Fourth Proportional to 139,212.80, 191,968.44 and 82,613.24

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Solution

The fourth proportional to 139,212.80, 191,968.44 and 82,613.24 is: 113,920.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,212.80 : 191,968.44 = 82,613.24 : x
  2. Step 2: Convert to fraction form
    139,212.80/191,968.44 = 82,613.24/x
  3. Step 3: Cross multiply
    139,212.80x = 191,968.44 × 82,613.24
  4. Step 4: Simplify right side
    139,212.80x = 15,859,134,806.15
  5. Step 5: Solve for x
    x = 15,859,134,806.15/139,212.80
  6. Step 6: Final answer
    x = 113,920.09

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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.