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Finding the Fourth Proportional to 212,200.01, 318,440.24 and 99,912.34

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Solution

The fourth proportional to 212,200.01, 318,440.24 and 99,912.34 is: 149,934.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,200.01 : 318,440.24 = 99,912.34 : x
  2. Step 2: Convert to fraction form
    212,200.01/318,440.24 = 99,912.34/x
  3. Step 3: Cross multiply
    212,200.01x = 318,440.24 × 99,912.34
  4. Step 4: Simplify right side
    212,200.01x = 31,816,107,436.80
  5. Step 5: Solve for x
    x = 31,816,107,436.80/212,200.01
  6. Step 6: Final answer
    x = 149,934.52

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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.