Home / 212,348.05-318,523.70-77,508.78

Finding the Fourth Proportional to 212,348.05, 318,523.70 and 77,508.78

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Solution

The fourth proportional to 212,348.05, 318,523.70 and 77,508.78 is: 116,263.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,348.05 : 318,523.70 = 77,508.78 : x
  2. Step 2: Convert to fraction form
    212,348.05/318,523.70 = 77,508.78/x
  3. Step 3: Cross multiply
    212,348.05x = 318,523.70 × 77,508.78
  4. Step 4: Simplify right side
    212,348.05x = 24,688,383,388.09
  5. Step 5: Solve for x
    x = 24,688,383,388.09/212,348.05
  6. Step 6: Final answer
    x = 116,263.76

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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.