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Finding the Fourth Proportional to 212,512.84, 318,811.34 and 60,711.24

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Solution

The fourth proportional to 212,512.84, 318,811.34 and 60,711.24 is: 91,078.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,512.84 : 318,811.34 = 60,711.24 : x
  2. Step 2: Convert to fraction form
    212,512.84/318,811.34 = 60,711.24/x
  3. Step 3: Cross multiply
    212,512.84x = 318,811.34 × 60,711.24
  4. Step 4: Simplify right side
    212,512.84x = 19,355,431,777.46
  5. Step 5: Solve for x
    x = 19,355,431,777.46/212,512.84
  6. Step 6: Final answer
    x = 91,078.88

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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.