Home / 212,231.32-318,273.12-79,038.90

Finding the Fourth Proportional to 212,231.32, 318,273.12 and 79,038.90

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Solution

The fourth proportional to 212,231.32, 318,273.12 and 79,038.90 is: 118,530.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,231.32 : 318,273.12 = 79,038.90 : x
  2. Step 2: Convert to fraction form
    212,231.32/318,273.12 = 79,038.90/x
  3. Step 3: Cross multiply
    212,231.32x = 318,273.12 × 79,038.90
  4. Step 4: Simplify right side
    212,231.32x = 25,155,957,304.37
  5. Step 5: Solve for x
    x = 25,155,957,304.37/212,231.32
  6. Step 6: Final answer
    x = 118,530.84

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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.