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Finding the Fourth Proportional to 253,636.60, 379,938.18 and 120,112

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Solution

The fourth proportional to 253,636.60, 379,938.18 and 120,112 is: 179,923.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,636.60 : 379,938.18 = 120,112 : x
  2. Step 2: Convert to fraction form
    253,636.60/379,938.18 = 120,112/x
  3. Step 3: Cross multiply
    253,636.60x = 379,938.18 × 120,112
  4. Step 4: Simplify right side
    253,636.60x = 45,635,134,676.16
  5. Step 5: Solve for x
    x = 45,635,134,676.16/253,636.60
  6. Step 6: Final answer
    x = 179,923.30

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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.