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Finding the Fourth Proportional to 65,569.20, 98,351.47 and 21,194.79

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Solution

The fourth proportional to 65,569.20, 98,351.47 and 21,194.79 is: 31,791.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,569.20 : 98,351.47 = 21,194.79 : x
  2. Step 2: Convert to fraction form
    65,569.20/98,351.47 = 21,194.79/x
  3. Step 3: Cross multiply
    65,569.20x = 98,351.47 × 21,194.79
  4. Step 4: Simplify right side
    65,569.20x = 2,084,538,567.91
  5. Step 5: Solve for x
    x = 2,084,538,567.91/65,569.20
  6. Step 6: Final answer
    x = 31,791.43

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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.