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Finding the Fourth Proportional to 139,615.44, 192,736.22 and 85,946.46

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Solution

The fourth proportional to 139,615.44, 192,736.22 and 85,946.46 is: 118,647.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,615.44 : 192,736.22 = 85,946.46 : x
  2. Step 2: Convert to fraction form
    139,615.44/192,736.22 = 85,946.46/x
  3. Step 3: Cross multiply
    139,615.44x = 192,736.22 × 85,946.46
  4. Step 4: Simplify right side
    139,615.44x = 16,564,995,822.78
  5. Step 5: Solve for x
    x = 16,564,995,822.78/139,615.44
  6. Step 6: Final answer
    x = 118,647.31

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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.