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Finding the Fourth Proportional to 137,636.20, 206,583.90 and 85,148.20

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Solution

The fourth proportional to 137,636.20, 206,583.90 and 85,148.20 is: 127,802.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,636.20 : 206,583.90 = 85,148.20 : x
  2. Step 2: Convert to fraction form
    137,636.20/206,583.90 = 85,148.20/x
  3. Step 3: Cross multiply
    137,636.20x = 206,583.90 × 85,148.20
  4. Step 4: Simplify right side
    137,636.20x = 17,590,247,233.98
  5. Step 5: Solve for x
    x = 17,590,247,233.98/137,636.20
  6. Step 6: Final answer
    x = 127,802.48

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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.