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Finding the Fourth Proportional to 159,422.40, 219,994.48 and 91,435.88

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Solution

The fourth proportional to 159,422.40, 219,994.48 and 91,435.88 is: 126,176.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,422.40 : 219,994.48 = 91,435.88 : x
  2. Step 2: Convert to fraction form
    159,422.40/219,994.48 = 91,435.88/x
  3. Step 3: Cross multiply
    159,422.40x = 219,994.48 × 91,435.88
  4. Step 4: Simplify right side
    159,422.40x = 20,115,388,873.94
  5. Step 5: Solve for x
    x = 20,115,388,873.94/159,422.40
  6. Step 6: Final answer
    x = 126,176.68

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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.