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Finding the Fourth Proportional to 163,409.36, 225,505.02 and 91,789.42

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Solution

The fourth proportional to 163,409.36, 225,505.02 and 91,789.42 is: 126,669.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,409.36 : 225,505.02 = 91,789.42 : x
  2. Step 2: Convert to fraction form
    163,409.36/225,505.02 = 91,789.42/x
  3. Step 3: Cross multiply
    163,409.36x = 225,505.02 × 91,789.42
  4. Step 4: Simplify right side
    163,409.36x = 20,698,974,992.89
  5. Step 5: Solve for x
    x = 20,698,974,992.89/163,409.36
  6. Step 6: Final answer
    x = 126,669.46

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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.