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Finding the Fourth Proportional to 65,652.20, 98,454.30 and 21,290.60

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Solution

The fourth proportional to 65,652.20, 98,454.30 and 21,290.60 is: 31,928.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,652.20 : 98,454.30 = 21,290.60 : x
  2. Step 2: Convert to fraction form
    65,652.20/98,454.30 = 21,290.60/x
  3. Step 3: Cross multiply
    65,652.20x = 98,454.30 × 21,290.60
  4. Step 4: Simplify right side
    65,652.20x = 2,096,151,119.58
  5. Step 5: Solve for x
    x = 2,096,151,119.58/65,652.20
  6. Step 6: Final answer
    x = 31,928.12

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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.