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Finding the Fourth Proportional to 212,381.28, 318,627.30 and 79,262.64

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Solution

The fourth proportional to 212,381.28, 318,627.30 and 79,262.64 is: 118,914.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,381.28 : 318,627.30 = 79,262.64 : x
  2. Step 2: Convert to fraction form
    212,381.28/318,627.30 = 79,262.64/x
  3. Step 3: Cross multiply
    212,381.28x = 318,627.30 × 79,262.64
  4. Step 4: Simplify right side
    212,381.28x = 25,255,240,974.07
  5. Step 5: Solve for x
    x = 25,255,240,974.07/212,381.28
  6. Step 6: Final answer
    x = 118,914.63

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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.