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Finding the Fourth Proportional to 65,506.78, 98,260.19 and 20,531.62

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Solution

The fourth proportional to 65,506.78, 98,260.19 and 20,531.62 is: 30,797.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,506.78 : 98,260.19 = 20,531.62 : x
  2. Step 2: Convert to fraction form
    65,506.78/98,260.19 = 20,531.62/x
  3. Step 3: Cross multiply
    65,506.78x = 98,260.19 × 20,531.62
  4. Step 4: Simplify right side
    65,506.78x = 2,017,441,197.98
  5. Step 5: Solve for x
    x = 2,017,441,197.98/65,506.78
  6. Step 6: Final answer
    x = 30,797.44

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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.