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Finding the Fourth Proportional to 212,351.76, 318,657.24 and 87,676.56

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Solution

The fourth proportional to 212,351.76, 318,657.24 and 87,676.56 is: 131,568.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,351.76 : 318,657.24 = 87,676.56 : x
  2. Step 2: Convert to fraction form
    212,351.76/318,657.24 = 87,676.56/x
  3. Step 3: Cross multiply
    212,351.76x = 318,657.24 × 87,676.56
  4. Step 4: Simplify right side
    212,351.76x = 27,938,770,622.29
  5. Step 5: Solve for x
    x = 27,938,770,622.29/212,351.76
  6. Step 6: Final answer
    x = 131,568.35

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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.