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Finding the Fourth Proportional to 117,705.81, 162,435.87 and 63,991.03

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Solution

The fourth proportional to 117,705.81, 162,435.87 and 63,991.03 is: 88,308.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,705.81 : 162,435.87 = 63,991.03 : x
  2. Step 2: Convert to fraction form
    117,705.81/162,435.87 = 63,991.03/x
  3. Step 3: Cross multiply
    117,705.81x = 162,435.87 × 63,991.03
  4. Step 4: Simplify right side
    117,705.81x = 10,394,438,310.29
  5. Step 5: Solve for x
    x = 10,394,438,310.29/117,705.81
  6. Step 6: Final answer
    x = 88,308.63

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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.