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Finding the Fourth Proportional to 65,668.80, 98,512.48 and 21,285.12

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Solution

The fourth proportional to 65,668.80, 98,512.48 and 21,285.12 is: 31,930.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,668.80 : 98,512.48 = 21,285.12 : x
  2. Step 2: Convert to fraction form
    65,668.80/98,512.48 = 21,285.12/x
  3. Step 3: Cross multiply
    65,668.80x = 98,512.48 × 21,285.12
  4. Step 4: Simplify right side
    65,668.80x = 2,096,849,958.30
  5. Step 5: Solve for x
    x = 2,096,849,958.30/65,668.80
  6. Step 6: Final answer
    x = 31,930.69

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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.