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Finding the Fourth Proportional to 139,316.60, 192,253.66 and 81,959.62

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Solution

The fourth proportional to 139,316.60, 192,253.66 and 81,959.62 is: 113,102.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,316.60 : 192,253.66 = 81,959.62 : x
  2. Step 2: Convert to fraction form
    139,316.60/192,253.66 = 81,959.62/x
  3. Step 3: Cross multiply
    139,316.60x = 192,253.66 × 81,959.62
  4. Step 4: Simplify right side
    139,316.60x = 15,757,035,546.14
  5. Step 5: Solve for x
    x = 15,757,035,546.14/139,316.60
  6. Step 6: Final answer
    x = 113,102.35

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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.