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Finding the Fourth Proportional to 163,251.81, 225,270.21 and 91,639.71

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Solution

The fourth proportional to 163,251.81, 225,270.21 and 91,639.71 is: 126,453.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,251.81 : 225,270.21 = 91,639.71 : x
  2. Step 2: Convert to fraction form
    163,251.81/225,270.21 = 91,639.71/x
  3. Step 3: Cross multiply
    163,251.81x = 225,270.21 × 91,639.71
  4. Step 4: Simplify right side
    163,251.81x = 20,643,696,716.04
  5. Step 5: Solve for x
    x = 20,643,696,716.04/163,251.81
  6. Step 6: Final answer
    x = 126,453.10

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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.