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Finding the Fourth Proportional to 108,536.60, 162,804.90 and 71,211.80

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Solution

The fourth proportional to 108,536.60, 162,804.90 and 71,211.80 is: 106,817.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,536.60 : 162,804.90 = 71,211.80 : x
  2. Step 2: Convert to fraction form
    108,536.60/162,804.90 = 71,211.80/x
  3. Step 3: Cross multiply
    108,536.60x = 162,804.90 × 71,211.80
  4. Step 4: Simplify right side
    108,536.60x = 11,593,629,977.82
  5. Step 5: Solve for x
    x = 11,593,629,977.82/108,536.60
  6. Step 6: Final answer
    x = 106,817.70

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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.