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Finding the Fourth Proportional to 43,668.80, 65,491.20 and 12,071.36

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Solution

The fourth proportional to 43,668.80, 65,491.20 and 12,071.36 is: 18,103.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,668.80 : 65,491.20 = 12,071.36 : x
  2. Step 2: Convert to fraction form
    43,668.80/65,491.20 = 12,071.36/x
  3. Step 3: Cross multiply
    43,668.80x = 65,491.20 × 12,071.36
  4. Step 4: Simplify right side
    43,668.80x = 790,567,852.03
  5. Step 5: Solve for x
    x = 790,567,852.03/43,668.80
  6. Step 6: Final answer
    x = 18,103.72

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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.