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Finding the Fourth Proportional to 65,723.40, 98,560.80 and 21,351.60

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Solution

The fourth proportional to 65,723.40, 98,560.80 and 21,351.60 is: 32,019.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,723.40 : 98,560.80 = 21,351.60 : x
  2. Step 2: Convert to fraction form
    65,723.40/98,560.80 = 21,351.60/x
  3. Step 3: Cross multiply
    65,723.40x = 98,560.80 × 21,351.60
  4. Step 4: Simplify right side
    65,723.40x = 2,104,430,777.28
  5. Step 5: Solve for x
    x = 2,104,430,777.28/65,723.40
  6. Step 6: Final answer
    x = 32,019.51

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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.