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Finding the Fourth Proportional to 65,728.40, 98,568.30 and 21,356.60

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Solution

The fourth proportional to 65,728.40, 98,568.30 and 21,356.60 is: 32,027.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,728.40 : 98,568.30 = 21,356.60 : x
  2. Step 2: Convert to fraction form
    65,728.40/98,568.30 = 21,356.60/x
  3. Step 3: Cross multiply
    65,728.40x = 98,568.30 × 21,356.60
  4. Step 4: Simplify right side
    65,728.40x = 2,105,083,755.78
  5. Step 5: Solve for x
    x = 2,105,083,755.78/65,728.40
  6. Step 6: Final answer
    x = 32,027.00

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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.