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Finding the Fourth Proportional to 65,986.62, 98,959.41 and 21,603.48

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Solution

The fourth proportional to 65,986.62, 98,959.41 and 21,603.48 is: 32,398.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,986.62 : 98,959.41 = 21,603.48 : x
  2. Step 2: Convert to fraction form
    65,986.62/98,959.41 = 21,603.48/x
  3. Step 3: Cross multiply
    65,986.62x = 98,959.41 × 21,603.48
  4. Step 4: Simplify right side
    65,986.62x = 2,137,867,634.75
  5. Step 5: Solve for x
    x = 2,137,867,634.75/65,986.62
  6. Step 6: Final answer
    x = 32,398.50

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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.