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Finding the Fourth Proportional to 198,885.72, 298,298.97 and 65,766.68

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Solution

The fourth proportional to 198,885.72, 298,298.97 and 65,766.68 is: 98,640.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,885.72 : 298,298.97 = 65,766.68 : x
  2. Step 2: Convert to fraction form
    198,885.72/298,298.97 = 65,766.68/x
  3. Step 3: Cross multiply
    198,885.72x = 298,298.97 × 65,766.68
  4. Step 4: Simplify right side
    198,885.72x = 19,618,132,531.45
  5. Step 5: Solve for x
    x = 19,618,132,531.45/198,885.72
  6. Step 6: Final answer
    x = 98,640.22

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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.