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Finding the Fourth Proportional to 212,350.68, 318,303.90 and 79,173

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Solution

The fourth proportional to 212,350.68, 318,303.90 and 79,173 is: 118,676.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,350.68 : 318,303.90 = 79,173 : x
  2. Step 2: Convert to fraction form
    212,350.68/318,303.90 = 79,173/x
  3. Step 3: Cross multiply
    212,350.68x = 318,303.90 × 79,173
  4. Step 4: Simplify right side
    212,350.68x = 25,201,074,674.70
  5. Step 5: Solve for x
    x = 25,201,074,674.70/212,350.68
  6. Step 6: Final answer
    x = 118,676.68

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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.