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Finding the Fourth Proportional to 212,310.84, 318,458 and 79,190.84

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Solution

The fourth proportional to 212,310.84, 318,458 and 79,190.84 is: 118,783.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,310.84 : 318,458 = 79,190.84 : x
  2. Step 2: Convert to fraction form
    212,310.84/318,458 = 79,190.84/x
  3. Step 3: Cross multiply
    212,310.84x = 318,458 × 79,190.84
  4. Step 4: Simplify right side
    212,310.84x = 25,218,956,524.72
  5. Step 5: Solve for x
    x = 25,218,956,524.72/212,310.84
  6. Step 6: Final answer
    x = 118,783.18

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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.