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Finding the Fourth Proportional to 43,410.80, 65,094.32 and 21,190.88

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Solution

The fourth proportional to 43,410.80, 65,094.32 and 21,190.88 is: 31,775.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,410.80 : 65,094.32 = 21,190.88 : x
  2. Step 2: Convert to fraction form
    43,410.80/65,094.32 = 21,190.88/x
  3. Step 3: Cross multiply
    43,410.80x = 65,094.32 × 21,190.88
  4. Step 4: Simplify right side
    43,410.80x = 1,379,405,923.80
  5. Step 5: Solve for x
    x = 1,379,405,923.80/43,410.80
  6. Step 6: Final answer
    x = 31,775.64

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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.