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Finding the Fourth Proportional to 139,274.73, 192,203.54 and 78,844.28

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Solution

The fourth proportional to 139,274.73, 192,203.54 and 78,844.28 is: 108,807.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,274.73 : 192,203.54 = 78,844.28 : x
  2. Step 2: Convert to fraction form
    139,274.73/192,203.54 = 78,844.28/x
  3. Step 3: Cross multiply
    139,274.73x = 192,203.54 × 78,844.28
  4. Step 4: Simplify right side
    139,274.73x = 15,154,148,369.51
  5. Step 5: Solve for x
    x = 15,154,148,369.51/139,274.73
  6. Step 6: Final answer
    x = 108,807.59

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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.