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Finding the Fourth Proportional to 206,975.20, 310,516.80 and 66,737.20

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Solution

The fourth proportional to 206,975.20, 310,516.80 and 66,737.20 is: 100,123.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,975.20 : 310,516.80 = 66,737.20 : x
  2. Step 2: Convert to fraction form
    206,975.20/310,516.80 = 66,737.20/x
  3. Step 3: Cross multiply
    206,975.20x = 310,516.80 × 66,737.20
  4. Step 4: Simplify right side
    206,975.20x = 20,723,021,784.96
  5. Step 5: Solve for x
    x = 20,723,021,784.96/206,975.20
  6. Step 6: Final answer
    x = 100,123.21

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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.