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Finding the Fourth Proportional to 65,618.88, 98,443.99 and 21,245.68

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Solution

The fourth proportional to 65,618.88, 98,443.99 and 21,245.68 is: 31,873.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,618.88 : 98,443.99 = 21,245.68 : x
  2. Step 2: Convert to fraction form
    65,618.88/98,443.99 = 21,245.68/x
  3. Step 3: Cross multiply
    65,618.88x = 98,443.99 × 21,245.68
  4. Step 4: Simplify right side
    65,618.88x = 2,091,509,017.24
  5. Step 5: Solve for x
    x = 2,091,509,017.24/65,618.88
  6. Step 6: Final answer
    x = 31,873.59

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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.