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Finding the Fourth Proportional to 101,228.85, 139,696.86 and 55,907.97

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Solution

The fourth proportional to 101,228.85, 139,696.86 and 55,907.97 is: 77,153.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,228.85 : 139,696.86 = 55,907.97 : x
  2. Step 2: Convert to fraction form
    101,228.85/139,696.86 = 55,907.97/x
  3. Step 3: Cross multiply
    101,228.85x = 139,696.86 × 55,907.97
  4. Step 4: Simplify right side
    101,228.85x = 7,810,167,857.97
  5. Step 5: Solve for x
    x = 7,810,167,857.97/101,228.85
  6. Step 6: Final answer
    x = 77,153.58

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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.