Home / 139,819.11-192,904.34-81,662.48

Finding the Fourth Proportional to 139,819.11, 192,904.34 and 81,662.48

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Solution

The fourth proportional to 139,819.11, 192,904.34 and 81,662.48 is: 112,667.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,819.11 : 192,904.34 = 81,662.48 : x
  2. Step 2: Convert to fraction form
    139,819.11/192,904.34 = 81,662.48/x
  3. Step 3: Cross multiply
    139,819.11x = 192,904.34 × 81,662.48
  4. Step 4: Simplify right side
    139,819.11x = 15,753,046,807.16
  5. Step 5: Solve for x
    x = 15,753,046,807.16/139,819.11
  6. Step 6: Final answer
    x = 112,667.34

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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.