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Finding the Fourth Proportional to 163,338.40, 225,391.31 and 91,702

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Solution

The fourth proportional to 163,338.40, 225,391.31 and 91,702 is: 126,539.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,338.40 : 225,391.31 = 91,702 : x
  2. Step 2: Convert to fraction form
    163,338.40/225,391.31 = 91,702/x
  3. Step 3: Cross multiply
    163,338.40x = 225,391.31 × 91,702
  4. Step 4: Simplify right side
    163,338.40x = 20,668,833,451.11
  5. Step 5: Solve for x
    x = 20,668,833,451.11/163,338.40
  6. Step 6: Final answer
    x = 126,539.95

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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.