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Finding the Fourth Proportional to 188,363.25, 259,941.39 and 103,485.78

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Solution

The fourth proportional to 188,363.25, 259,941.39 and 103,485.78 is: 142,810.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,363.25 : 259,941.39 = 103,485.78 : x
  2. Step 2: Convert to fraction form
    188,363.25/259,941.39 = 103,485.78/x
  3. Step 3: Cross multiply
    188,363.25x = 259,941.39 × 103,485.78
  4. Step 4: Simplify right side
    188,363.25x = 26,900,237,110.36
  5. Step 5: Solve for x
    x = 26,900,237,110.36/188,363.25
  6. Step 6: Final answer
    x = 142,810.43

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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.