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Finding the Fourth Proportional to 43,757.40, 65,643.30 and 18,809.40

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Solution

The fourth proportional to 43,757.40, 65,643.30 and 18,809.40 is: 28,217.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,757.40 : 65,643.30 = 18,809.40 : x
  2. Step 2: Convert to fraction form
    43,757.40/65,643.30 = 18,809.40/x
  3. Step 3: Cross multiply
    43,757.40x = 65,643.30 × 18,809.40
  4. Step 4: Simplify right side
    43,757.40x = 1,234,711,087.02
  5. Step 5: Solve for x
    x = 1,234,711,087.02/43,757.40
  6. Step 6: Final answer
    x = 28,217.19

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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.