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Finding the Fourth Proportional to 108,871.36, 163,287.60 and 69,310.96

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Solution

The fourth proportional to 108,871.36, 163,287.60 and 69,310.96 is: 103,954.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,871.36 : 163,287.60 = 69,310.96 : x
  2. Step 2: Convert to fraction form
    108,871.36/163,287.60 = 69,310.96/x
  3. Step 3: Cross multiply
    108,871.36x = 163,287.60 × 69,310.96
  4. Step 4: Simplify right side
    108,871.36x = 11,317,620,312.10
  5. Step 5: Solve for x
    x = 11,317,620,312.10/108,871.36
  6. Step 6: Final answer
    x = 103,954.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.