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Finding the Fourth Proportional to 139,299, 192,232.62 and 79,683

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Solution

The fourth proportional to 139,299, 192,232.62 and 79,683 is: 109,962.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,299 : 192,232.62 = 79,683 : x
  2. Step 2: Convert to fraction form
    139,299/192,232.62 = 79,683/x
  3. Step 3: Cross multiply
    139,299x = 192,232.62 × 79,683
  4. Step 4: Simplify right side
    139,299x = 15,317,671,859.46
  5. Step 5: Solve for x
    x = 15,317,671,859.46/139,299
  6. Step 6: Final answer
    x = 109,962.54

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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.