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Finding the Fourth Proportional to 100,745.78, 139,026.30 and 54,803.97

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Solution

The fourth proportional to 100,745.78, 139,026.30 and 54,803.97 is: 75,627.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,745.78 : 139,026.30 = 54,803.97 : x
  2. Step 2: Convert to fraction form
    100,745.78/139,026.30 = 54,803.97/x
  3. Step 3: Cross multiply
    100,745.78x = 139,026.30 × 54,803.97
  4. Step 4: Simplify right side
    100,745.78x = 7,619,192,732.02
  5. Step 5: Solve for x
    x = 7,619,192,732.02/100,745.78
  6. Step 6: Final answer
    x = 75,627.91

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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.