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Finding the Fourth Proportional to 139,444.49, 192,429.73 and 79,020.87

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Solution

The fourth proportional to 139,444.49, 192,429.73 and 79,020.87 is: 109,046.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,444.49 : 192,429.73 = 79,020.87 : x
  2. Step 2: Convert to fraction form
    139,444.49/192,429.73 = 79,020.87/x
  3. Step 3: Cross multiply
    139,444.49x = 192,429.73 × 79,020.87
  4. Step 4: Simplify right side
    139,444.49x = 15,205,963,611.14
  5. Step 5: Solve for x
    x = 15,205,963,611.14/139,444.49
  6. Step 6: Final answer
    x = 109,046.72

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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.