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Finding the Fourth Proportional to 212,232.32, 318,274.62 and 79,039.90

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Solution

The fourth proportional to 212,232.32, 318,274.62 and 79,039.90 is: 118,532.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,232.32 : 318,274.62 = 79,039.90 : x
  2. Step 2: Convert to fraction form
    212,232.32/318,274.62 = 79,039.90/x
  3. Step 3: Cross multiply
    212,232.32x = 318,274.62 × 79,039.90
  4. Step 4: Simplify right side
    212,232.32x = 25,156,394,137.34
  5. Step 5: Solve for x
    x = 25,156,394,137.34/212,232.32
  6. Step 6: Final answer
    x = 118,532.34

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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.