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Finding the Fourth Proportional to 43,560, 65,369.28 and 20,186.88

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Solution

The fourth proportional to 43,560, 65,369.28 and 20,186.88 is: 30,293.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,560 : 65,369.28 = 20,186.88 : x
  2. Step 2: Convert to fraction form
    43,560/65,369.28 = 20,186.88/x
  3. Step 3: Cross multiply
    43,560x = 65,369.28 × 20,186.88
  4. Step 4: Simplify right side
    43,560x = 1,319,601,811.05
  5. Step 5: Solve for x
    x = 1,319,601,811.05/43,560
  6. Step 6: Final answer
    x = 30,293.89

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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.