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Finding the Fourth Proportional to 100,887.44, 139,223.36 and 55,564.56

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Solution

The fourth proportional to 100,887.44, 139,223.36 and 55,564.56 is: 76,678.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,887.44 : 139,223.36 = 55,564.56 : x
  2. Step 2: Convert to fraction form
    100,887.44/139,223.36 = 55,564.56/x
  3. Step 3: Cross multiply
    100,887.44x = 139,223.36 × 55,564.56
  4. Step 4: Simplify right side
    100,887.44x = 7,735,884,740.12
  5. Step 5: Solve for x
    x = 7,735,884,740.12/100,887.44
  6. Step 6: Final answer
    x = 76,678.37

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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.