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Finding the Fourth Proportional to 139,661.28, 192,736.62 and 76,003.16

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Solution

The fourth proportional to 139,661.28, 192,736.62 and 76,003.16 is: 104,886.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,661.28 : 192,736.62 = 76,003.16 : x
  2. Step 2: Convert to fraction form
    139,661.28/192,736.62 = 76,003.16/x
  3. Step 3: Cross multiply
    139,661.28x = 192,736.62 × 76,003.16
  4. Step 4: Simplify right side
    139,661.28x = 14,648,591,204.04
  5. Step 5: Solve for x
    x = 14,648,591,204.04/139,661.28
  6. Step 6: Final answer
    x = 104,886.56

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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.