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Finding the Fourth Proportional to 234,907.20, 351,640.80 and 129,403.20

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Solution

The fourth proportional to 234,907.20, 351,640.80 and 129,403.20 is: 193,708.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    234,907.20 : 351,640.80 = 129,403.20 : x
  2. Step 2: Convert to fraction form
    234,907.20/351,640.80 = 129,403.20/x
  3. Step 3: Cross multiply
    234,907.20x = 351,640.80 × 129,403.20
  4. Step 4: Simplify right side
    234,907.20x = 45,503,444,770.56
  5. Step 5: Solve for x
    x = 45,503,444,770.56/234,907.20
  6. Step 6: Final answer
    x = 193,708.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.