Home / 212,315.18-318,462.44-79,185.20

Finding the Fourth Proportional to 212,315.18, 318,462.44 and 79,185.20

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Solution

The fourth proportional to 212,315.18, 318,462.44 and 79,185.20 is: 118,773.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,315.18 : 318,462.44 = 79,185.20 : x
  2. Step 2: Convert to fraction form
    212,315.18/318,462.44 = 79,185.20/x
  3. Step 3: Cross multiply
    212,315.18x = 318,462.44 × 79,185.20
  4. Step 4: Simplify right side
    212,315.18x = 25,217,510,015.65
  5. Step 5: Solve for x
    x = 25,217,510,015.65/212,315.18
  6. Step 6: Final answer
    x = 118,773.94

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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.