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Finding the Fourth Proportional to 159,641.56, 220,295.73 and 91,643.68

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Solution

The fourth proportional to 159,641.56, 220,295.73 and 91,643.68 is: 126,462.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,641.56 : 220,295.73 = 91,643.68 : x
  2. Step 2: Convert to fraction form
    159,641.56/220,295.73 = 91,643.68/x
  3. Step 3: Cross multiply
    159,641.56x = 220,295.73 × 91,643.68
  4. Step 4: Simplify right side
    159,641.56x = 20,188,711,385.49
  5. Step 5: Solve for x
    x = 20,188,711,385.49/159,641.56
  6. Step 6: Final answer
    x = 126,462.75

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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.