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Finding the Fourth Proportional to 139,309.74, 192,247.83 and 75,648.60

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Solution

The fourth proportional to 139,309.74, 192,247.83 and 75,648.60 is: 104,395.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,309.74 : 192,247.83 = 75,648.60 : x
  2. Step 2: Convert to fraction form
    139,309.74/192,247.83 = 75,648.60/x
  3. Step 3: Cross multiply
    139,309.74x = 192,247.83 × 75,648.60
  4. Step 4: Simplify right side
    139,309.74x = 14,543,279,192.54
  5. Step 5: Solve for x
    x = 14,543,279,192.54/139,309.74
  6. Step 6: Final answer
    x = 104,395.28

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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.