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Finding the Fourth Proportional to 65,620.66, 98,446.66 and 21,247.46

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Solution

The fourth proportional to 65,620.66, 98,446.66 and 21,247.46 is: 31,876.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,620.66 : 98,446.66 = 21,247.46 : x
  2. Step 2: Convert to fraction form
    65,620.66/98,446.66 = 21,247.46/x
  3. Step 3: Cross multiply
    65,620.66x = 98,446.66 × 21,247.46
  4. Step 4: Simplify right side
    65,620.66x = 2,091,740,978.25
  5. Step 5: Solve for x
    x = 2,091,740,978.25/65,620.66
  6. Step 6: Final answer
    x = 31,876.26

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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.