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Finding the Fourth Proportional to 163,399.73, 225,491.75 and 91,779.80

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Solution

The fourth proportional to 163,399.73, 225,491.75 and 91,779.80 is: 126,656.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,399.73 : 225,491.75 = 91,779.80 : x
  2. Step 2: Convert to fraction form
    163,399.73/225,491.75 = 91,779.80/x
  3. Step 3: Cross multiply
    163,399.73x = 225,491.75 × 91,779.80
  4. Step 4: Simplify right side
    163,399.73x = 20,695,587,821.48
  5. Step 5: Solve for x
    x = 20,695,587,821.48/163,399.73
  6. Step 6: Final answer
    x = 126,656.20

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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.