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Finding the Fourth Proportional to 81,171.90, 112,051.71 and 49,350.96

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Solution

The fourth proportional to 81,171.90, 112,051.71 and 49,350.96 is: 68,125.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,171.90 : 112,051.71 = 49,350.96 : x
  2. Step 2: Convert to fraction form
    81,171.90/112,051.71 = 49,350.96/x
  3. Step 3: Cross multiply
    81,171.90x = 112,051.71 × 49,350.96
  4. Step 4: Simplify right side
    81,171.90x = 5,529,859,458.14
  5. Step 5: Solve for x
    x = 5,529,859,458.14/81,171.90
  6. Step 6: Final answer
    x = 68,125.29

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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.