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Finding the Fourth Proportional to 212,324.19, 318,387.87 and 79,168.69

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Solution

The fourth proportional to 212,324.19, 318,387.87 and 79,168.69 is: 118,716.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,324.19 : 318,387.87 = 79,168.69 : x
  2. Step 2: Convert to fraction form
    212,324.19/318,387.87 = 79,168.69/x
  3. Step 3: Cross multiply
    212,324.19x = 318,387.87 × 79,168.69
  4. Step 4: Simplify right side
    212,324.19x = 25,206,350,579.79
  5. Step 5: Solve for x
    x = 25,206,350,579.79/212,324.19
  6. Step 6: Final answer
    x = 118,716.34

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1.5x scale

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.