Home / 212,284.80-318,427.20-137,489.40

Finding the Fourth Proportional to 212,284.80, 318,427.20 and 137,489.40

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Solution

The fourth proportional to 212,284.80, 318,427.20 and 137,489.40 is: 206,234.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,284.80 : 318,427.20 = 137,489.40 : x
  2. Step 2: Convert to fraction form
    212,284.80/318,427.20 = 137,489.40/x
  3. Step 3: Cross multiply
    212,284.80x = 318,427.20 × 137,489.40
  4. Step 4: Simplify right side
    212,284.80x = 43,780,364,671.68
  5. Step 5: Solve for x
    x = 43,780,364,671.68/212,284.80
  6. Step 6: Final answer
    x = 206,234.10

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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.