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Finding the Fourth Proportional to 139,683.97, 192,804.57 and 91,292.95

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Solution

The fourth proportional to 139,683.97, 192,804.57 and 91,292.95 is: 126,010.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,683.97 : 192,804.57 = 91,292.95 : x
  2. Step 2: Convert to fraction form
    139,683.97/192,804.57 = 91,292.95/x
  3. Step 3: Cross multiply
    139,683.97x = 192,804.57 × 91,292.95
  4. Step 4: Simplify right side
    139,683.97x = 17,601,697,968.78
  5. Step 5: Solve for x
    x = 17,601,697,968.78/139,683.97
  6. Step 6: Final answer
    x = 126,010.87

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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.