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Finding the Fourth Proportional to 100,734.03, 139,015.31 and 55,414.53

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Solution

The fourth proportional to 100,734.03, 139,015.31 and 55,414.53 is: 76,473.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,734.03 : 139,015.31 = 55,414.53 : x
  2. Step 2: Convert to fraction form
    100,734.03/139,015.31 = 55,414.53/x
  3. Step 3: Cross multiply
    100,734.03x = 139,015.31 × 55,414.53
  4. Step 4: Simplify right side
    100,734.03x = 7,703,467,789.38
  5. Step 5: Solve for x
    x = 7,703,467,789.38/100,734.03
  6. Step 6: Final answer
    x = 76,473.34

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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.