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Finding the Fourth Proportional to 159,579.80, 220,203.89 and 91,580.50

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Solution

The fourth proportional to 159,579.80, 220,203.89 and 91,580.50 is: 126,371.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,579.80 : 220,203.89 = 91,580.50 : x
  2. Step 2: Convert to fraction form
    159,579.80/220,203.89 = 91,580.50/x
  3. Step 3: Cross multiply
    159,579.80x = 220,203.89 × 91,580.50
  4. Step 4: Simplify right side
    159,579.80x = 20,166,382,348.15
  5. Step 5: Solve for x
    x = 20,166,382,348.15/159,579.80
  6. Step 6: Final answer
    x = 126,371.77

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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.