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Finding the Fourth Proportional to 81,172.62, 112,051.34 and 69,796.44

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Solution

The fourth proportional to 81,172.62, 112,051.34 and 69,796.44 is: 96,347.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,172.62 : 112,051.34 = 69,796.44 : x
  2. Step 2: Convert to fraction form
    81,172.62/112,051.34 = 69,796.44/x
  3. Step 3: Cross multiply
    81,172.62x = 112,051.34 × 69,796.44
  4. Step 4: Simplify right side
    81,172.62x = 7,820,784,629.23
  5. Step 5: Solve for x
    x = 7,820,784,629.23/81,172.62
  6. Step 6: Final answer
    x = 96,347.57

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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.