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Finding the Fourth Proportional to 139,334.81, 192,361.73 and 91,726.55

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Solution

The fourth proportional to 139,334.81, 192,361.73 and 91,726.55 is: 126,635.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,334.81 : 192,361.73 = 91,726.55 : x
  2. Step 2: Convert to fraction form
    139,334.81/192,361.73 = 91,726.55/x
  3. Step 3: Cross multiply
    139,334.81x = 192,361.73 × 91,726.55
  4. Step 4: Simplify right side
    139,334.81x = 17,644,677,844.93
  5. Step 5: Solve for x
    x = 17,644,677,844.93/139,334.81
  6. Step 6: Final answer
    x = 126,635.10

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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.