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Finding the Fourth Proportional to 100,940.33, 139,295.81 and 55,622.52

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Solution

The fourth proportional to 100,940.33, 139,295.81 and 55,622.52 is: 76,758.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,940.33 : 139,295.81 = 55,622.52 : x
  2. Step 2: Convert to fraction form
    100,940.33/139,295.81 = 55,622.52/x
  3. Step 3: Cross multiply
    100,940.33x = 139,295.81 × 55,622.52
  4. Step 4: Simplify right side
    100,940.33x = 7,747,983,699.53
  5. Step 5: Solve for x
    x = 7,747,983,699.53/100,940.33
  6. Step 6: Final answer
    x = 76,758.06

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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.