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Finding the Fourth Proportional to 65,620.73, 98,446.74 and 21,247.50

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Solution

The fourth proportional to 65,620.73, 98,446.74 and 21,247.50 is: 31,876.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,620.73 : 98,446.74 = 21,247.50 : x
  2. Step 2: Convert to fraction form
    65,620.73/98,446.74 = 21,247.50/x
  3. Step 3: Cross multiply
    65,620.73x = 98,446.74 × 21,247.50
  4. Step 4: Simplify right side
    65,620.73x = 2,091,747,108.15
  5. Step 5: Solve for x
    x = 2,091,747,108.15/65,620.73
  6. Step 6: Final answer
    x = 31,876.32

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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.