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Finding the Fourth Proportional to 41,124.60, 61,686.90 and 20,388.60

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Solution

The fourth proportional to 41,124.60, 61,686.90 and 20,388.60 is: 30,582.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,124.60 : 61,686.90 = 20,388.60 : x
  2. Step 2: Convert to fraction form
    41,124.60/61,686.90 = 20,388.60/x
  3. Step 3: Cross multiply
    41,124.60x = 61,686.90 × 20,388.60
  4. Step 4: Simplify right side
    41,124.60x = 1,257,709,529.34
  5. Step 5: Solve for x
    x = 1,257,709,529.34/41,124.60
  6. Step 6: Final answer
    x = 30,582.90

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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.