Home / 212,009.60-318,012.16-54,236.80

Finding the Fourth Proportional to 212,009.60, 318,012.16 and 54,236.80

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Solution

The fourth proportional to 212,009.60, 318,012.16 and 54,236.80 is: 81,354.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,009.60 : 318,012.16 = 54,236.80 : x
  2. Step 2: Convert to fraction form
    212,009.60/318,012.16 = 54,236.80/x
  3. Step 3: Cross multiply
    212,009.60x = 318,012.16 × 54,236.80
  4. Step 4: Simplify right side
    212,009.60x = 17,247,961,919.49
  5. Step 5: Solve for x
    x = 17,247,961,919.49/212,009.60
  6. Step 6: Final answer
    x = 81,354.63

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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.