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Finding the Fourth Proportional to 137,636.55, 206,121.47 and 69,990.62

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Solution

The fourth proportional to 137,636.55, 206,121.47 and 69,990.62 is: 104,816.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,636.55 : 206,121.47 = 69,990.62 : x
  2. Step 2: Convert to fraction form
    137,636.55/206,121.47 = 69,990.62/x
  3. Step 3: Cross multiply
    137,636.55x = 206,121.47 × 69,990.62
  4. Step 4: Simplify right side
    137,636.55x = 14,426,568,100.05
  5. Step 5: Solve for x
    x = 14,426,568,100.05/137,636.55
  6. Step 6: Final answer
    x = 104,816.40

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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.