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Finding the Fourth Proportional to 101,201.05, 139,662.89 and 55,878.87

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Solution

The fourth proportional to 101,201.05, 139,662.89 and 55,878.87 is: 77,115.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,201.05 : 139,662.89 = 55,878.87 : x
  2. Step 2: Convert to fraction form
    101,201.05/139,662.89 = 55,878.87/x
  3. Step 3: Cross multiply
    101,201.05x = 139,662.89 × 55,878.87
  4. Step 4: Simplify right side
    101,201.05x = 7,804,204,474.13
  5. Step 5: Solve for x
    x = 7,804,204,474.13/101,201.05
  6. Step 6: Final answer
    x = 77,115.84

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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.