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Finding the Fourth Proportional to 65,906.40, 98,725.20 and 40,869.60

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Solution

The fourth proportional to 65,906.40, 98,725.20 and 40,869.60 is: 61,221.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,906.40 : 98,725.20 = 40,869.60 : x
  2. Step 2: Convert to fraction form
    65,906.40/98,725.20 = 40,869.60/x
  3. Step 3: Cross multiply
    65,906.40x = 98,725.20 × 40,869.60
  4. Step 4: Simplify right side
    65,906.40x = 4,034,859,433.92
  5. Step 5: Solve for x
    x = 4,034,859,433.92/65,906.40
  6. Step 6: Final answer
    x = 61,221.06

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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.