Home / 212,358.43-318,315.52-79,180.75

Finding the Fourth Proportional to 212,358.43, 318,315.52 and 79,180.75

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Solution

The fourth proportional to 212,358.43, 318,315.52 and 79,180.75 is: 118,688.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,358.43 : 318,315.52 = 79,180.75 : x
  2. Step 2: Convert to fraction form
    212,358.43/318,315.52 = 79,180.75/x
  3. Step 3: Cross multiply
    212,358.43x = 318,315.52 × 79,180.75
  4. Step 4: Simplify right side
    212,358.43x = 25,204,461,610.24
  5. Step 5: Solve for x
    x = 25,204,461,610.24/212,358.43
  6. Step 6: Final answer
    x = 118,688.30

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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.