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Finding the Fourth Proportional to 252,353.55, 378,568.28 and 81,518.25

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Solution

The fourth proportional to 252,353.55, 378,568.28 and 81,518.25 is: 122,289.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,353.55 : 378,568.28 = 81,518.25 : x
  2. Step 2: Convert to fraction form
    252,353.55/378,568.28 = 81,518.25/x
  3. Step 3: Cross multiply
    252,353.55x = 378,568.28 × 81,518.25
  4. Step 4: Simplify right side
    252,353.55x = 30,860,223,691.11
  5. Step 5: Solve for x
    x = 30,860,223,691.11/252,353.55
  6. Step 6: Final answer
    x = 122,289.64

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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.