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Finding the Fourth Proportional to 236,781.50, 326,781 and 129,367.67

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Solution

The fourth proportional to 236,781.50, 326,781 and 129,367.67 is: 178,539.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    236,781.50 : 326,781 = 129,367.67 : x
  2. Step 2: Convert to fraction form
    236,781.50/326,781 = 129,367.67/x
  3. Step 3: Cross multiply
    236,781.50x = 326,781 × 129,367.67
  4. Step 4: Simplify right side
    236,781.50x = 42,274,894,936.37
  5. Step 5: Solve for x
    x = 42,274,894,936.37/236,781.50
  6. Step 6: Final answer
    x = 178,539.69

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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.