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Finding the Fourth Proportional to 212,321.68, 318,524.28 and 70,161.22

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Solution

The fourth proportional to 212,321.68, 318,524.28 and 70,161.22 is: 105,255.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,321.68 : 318,524.28 = 70,161.22 : x
  2. Step 2: Convert to fraction form
    212,321.68/318,524.28 = 70,161.22/x
  3. Step 3: Cross multiply
    212,321.68x = 318,524.28 × 70,161.22
  4. Step 4: Simplify right side
    212,321.68x = 22,348,052,084.42
  5. Step 5: Solve for x
    x = 22,348,052,084.42/212,321.68
  6. Step 6: Final answer
    x = 105,255.63

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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.