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Finding the Fourth Proportional to 139,099.68, 191,960.28 and 82,509.84

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Solution

The fourth proportional to 139,099.68, 191,960.28 and 82,509.84 is: 113,865.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,099.68 : 191,960.28 = 82,509.84 : x
  2. Step 2: Convert to fraction form
    139,099.68/191,960.28 = 82,509.84/x
  3. Step 3: Cross multiply
    139,099.68x = 191,960.28 × 82,509.84
  4. Step 4: Simplify right side
    139,099.68x = 15,838,611,989.16
  5. Step 5: Solve for x
    x = 15,838,611,989.16/139,099.68
  6. Step 6: Final answer
    x = 113,865.19

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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.