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Finding the Fourth Proportional to 212,340.74, 318,622.44 and 85,994.42

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Solution

The fourth proportional to 212,340.74, 318,622.44 and 85,994.42 is: 129,036.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,340.74 : 318,622.44 = 85,994.42 : x
  2. Step 2: Convert to fraction form
    212,340.74/318,622.44 = 85,994.42/x
  3. Step 3: Cross multiply
    212,340.74x = 318,622.44 × 85,994.42
  4. Step 4: Simplify right side
    212,340.74x = 27,399,751,926.78
  5. Step 5: Solve for x
    x = 27,399,751,926.78/212,340.74
  6. Step 6: Final answer
    x = 129,036.72

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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.