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Finding the Fourth Proportional to 40,445.80, 60,644.40 and 20,762.80

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Solution

The fourth proportional to 40,445.80, 60,644.40 and 20,762.80 is: 31,131.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,445.80 : 60,644.40 = 20,762.80 : x
  2. Step 2: Convert to fraction form
    40,445.80/60,644.40 = 20,762.80/x
  3. Step 3: Cross multiply
    40,445.80x = 60,644.40 × 20,762.80
  4. Step 4: Simplify right side
    40,445.80x = 1,259,147,548.32
  5. Step 5: Solve for x
    x = 1,259,147,548.32/40,445.80
  6. Step 6: Final answer
    x = 31,131.73

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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.