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Finding the Fourth Proportional to 139,696.70, 192,818.50 and 86,026.68

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Solution

The fourth proportional to 139,696.70, 192,818.50 and 86,026.68 is: 118,739.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,696.70 : 192,818.50 = 86,026.68 : x
  2. Step 2: Convert to fraction form
    139,696.70/192,818.50 = 86,026.68/x
  3. Step 3: Cross multiply
    139,696.70x = 192,818.50 × 86,026.68
  4. Step 4: Simplify right side
    139,696.70x = 16,587,535,182.51
  5. Step 5: Solve for x
    x = 16,587,535,182.51/139,696.70
  6. Step 6: Final answer
    x = 118,739.64

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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.