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Finding the Fourth Proportional to 139,501.92, 192,514.84 and 75,839.96

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Solution

The fourth proportional to 139,501.92, 192,514.84 and 75,839.96 is: 104,660.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,501.92 : 192,514.84 = 75,839.96 : x
  2. Step 2: Convert to fraction form
    139,501.92/192,514.84 = 75,839.96/x
  3. Step 3: Cross multiply
    139,501.92x = 192,514.84 × 75,839.96
  4. Step 4: Simplify right side
    139,501.92x = 14,600,317,765.01
  5. Step 5: Solve for x
    x = 14,600,317,765.01/139,501.92
  6. Step 6: Final answer
    x = 104,660.34

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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.