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Finding the Fourth Proportional to 43,740, 65,553.84 and 21,260.88

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Solution

The fourth proportional to 43,740, 65,553.84 and 21,260.88 is: 31,864.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,740 : 65,553.84 = 21,260.88 : x
  2. Step 2: Convert to fraction form
    43,740/65,553.84 = 21,260.88/x
  3. Step 3: Cross multiply
    43,740x = 65,553.84 × 21,260.88
  4. Step 4: Simplify right side
    43,740x = 1,393,732,325.78
  5. Step 5: Solve for x
    x = 1,393,732,325.78/43,740
  6. Step 6: Final answer
    x = 31,864.02

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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.