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Finding the Fourth Proportional to 65,690.73, 98,550.48 and 21,321.95

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Solution

The fourth proportional to 65,690.73, 98,550.48 and 21,321.95 is: 31,987.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,690.73 : 98,550.48 = 21,321.95 : x
  2. Step 2: Convert to fraction form
    65,690.73/98,550.48 = 21,321.95/x
  3. Step 3: Cross multiply
    65,690.73x = 98,550.48 × 21,321.95
  4. Step 4: Simplify right side
    65,690.73x = 2,101,287,914.28
  5. Step 5: Solve for x
    x = 2,101,287,914.28/65,690.73
  6. Step 6: Final answer
    x = 31,987.59

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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.