Home / 212,723.70-318,664.35-137,895.90

Finding the Fourth Proportional to 212,723.70, 318,664.35 and 137,895.90

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Solution

The fourth proportional to 212,723.70, 318,664.35 and 137,895.90 is: 206,570.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,723.70 : 318,664.35 = 137,895.90 : x
  2. Step 2: Convert to fraction form
    212,723.70/318,664.35 = 137,895.90/x
  3. Step 3: Cross multiply
    212,723.70x = 318,664.35 × 137,895.90
  4. Step 4: Simplify right side
    212,723.70x = 43,942,507,341.17
  5. Step 5: Solve for x
    x = 43,942,507,341.17/212,723.70
  6. Step 6: Final answer
    x = 206,570.81

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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.