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Finding the Fourth Proportional to 235,550.90, 324,945.78 and 139,989.98

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Solution

The fourth proportional to 235,550.90, 324,945.78 and 139,989.98 is: 193,118.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,550.90 : 324,945.78 = 139,989.98 : x
  2. Step 2: Convert to fraction form
    235,550.90/324,945.78 = 139,989.98/x
  3. Step 3: Cross multiply
    235,550.90x = 324,945.78 × 139,989.98
  4. Step 4: Simplify right side
    235,550.90x = 45,489,153,243.28
  5. Step 5: Solve for x
    x = 45,489,153,243.28/235,550.90
  6. Step 6: Final answer
    x = 193,118.15

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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.