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Finding the Fourth Proportional to 139,447.44, 192,436.80 and 79,017.84

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Solution

The fourth proportional to 139,447.44, 192,436.80 and 79,017.84 is: 109,044.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,447.44 : 192,436.80 = 79,017.84 : x
  2. Step 2: Convert to fraction form
    139,447.44/192,436.80 = 79,017.84/x
  3. Step 3: Cross multiply
    139,447.44x = 192,436.80 × 79,017.84
  4. Step 4: Simplify right side
    139,447.44x = 15,205,940,272.51
  5. Step 5: Solve for x
    x = 15,205,940,272.51/139,447.44
  6. Step 6: Final answer
    x = 109,044.24

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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.