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Finding the Fourth Proportional to 212,657.22, 318,975.21 and 79,527.69

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Solution

The fourth proportional to 212,657.22, 318,975.21 and 79,527.69 is: 119,287.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,657.22 : 318,975.21 = 79,527.69 : x
  2. Step 2: Convert to fraction form
    212,657.22/318,975.21 = 79,527.69/x
  3. Step 3: Cross multiply
    212,657.22x = 318,975.21 × 79,527.69
  4. Step 4: Simplify right side
    212,657.22x = 25,367,361,618.56
  5. Step 5: Solve for x
    x = 25,367,361,618.56/212,657.22
  6. Step 6: Final answer
    x = 119,287.56

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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.