Home / 139,345.92-192,272.40-82,771.20

Finding the Fourth Proportional to 139,345.92, 192,272.40 and 82,771.20

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Solution

The fourth proportional to 139,345.92, 192,272.40 and 82,771.20 is: 114,209.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,345.92 : 192,272.40 = 82,771.20 : x
  2. Step 2: Convert to fraction form
    139,345.92/192,272.40 = 82,771.20/x
  3. Step 3: Cross multiply
    139,345.92x = 192,272.40 × 82,771.20
  4. Step 4: Simplify right side
    139,345.92x = 15,914,617,274.88
  5. Step 5: Solve for x
    x = 15,914,617,274.88/139,345.92
  6. Step 6: Final answer
    x = 114,209.42

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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.