Home / 212,416.40-318,614.06-79,286.42

Finding the Fourth Proportional to 212,416.40, 318,614.06 and 79,286.42

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Solution

The fourth proportional to 212,416.40, 318,614.06 and 79,286.42 is: 118,925.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,416.40 : 318,614.06 = 79,286.42 : x
  2. Step 2: Convert to fraction form
    212,416.40/318,614.06 = 79,286.42/x
  3. Step 3: Cross multiply
    212,416.40x = 318,614.06 × 79,286.42
  4. Step 4: Simplify right side
    212,416.40x = 25,261,768,179.07
  5. Step 5: Solve for x
    x = 25,261,768,179.07/212,416.40
  6. Step 6: Final answer
    x = 118,925.70

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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.