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Finding the Fourth Proportional to 159,617.88, 220,272.70 and 91,639.26

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Solution

The fourth proportional to 159,617.88, 220,272.70 and 91,639.26 is: 126,462.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,617.88 : 220,272.70 = 91,639.26 : x
  2. Step 2: Convert to fraction form
    159,617.88/220,272.70 = 91,639.26/x
  3. Step 3: Cross multiply
    159,617.88x = 220,272.70 × 91,639.26
  4. Step 4: Simplify right side
    159,617.88x = 20,185,627,226.20
  5. Step 5: Solve for x
    x = 20,185,627,226.20/159,617.88
  6. Step 6: Final answer
    x = 126,462.19

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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.