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Finding the Fourth Proportional to 252,910.20, 379,386.90 and 75,405.72

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Solution

The fourth proportional to 252,910.20, 379,386.90 and 75,405.72 is: 113,115.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,910.20 : 379,386.90 = 75,405.72 : x
  2. Step 2: Convert to fraction form
    252,910.20/379,386.90 = 75,405.72/x
  3. Step 3: Cross multiply
    252,910.20x = 379,386.90 × 75,405.72
  4. Step 4: Simplify right side
    252,910.20x = 28,607,942,353.07
  5. Step 5: Solve for x
    x = 28,607,942,353.07/252,910.20
  6. Step 6: Final answer
    x = 113,115.02

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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.