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Finding the Fourth Proportional to 64,399.74, 96,531.42 and 21,664.48

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Solution

The fourth proportional to 64,399.74, 96,531.42 and 21,664.48 is: 32,473.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,399.74 : 96,531.42 = 21,664.48 : x
  2. Step 2: Convert to fraction form
    64,399.74/96,531.42 = 21,664.48/x
  3. Step 3: Cross multiply
    64,399.74x = 96,531.42 × 21,664.48
  4. Step 4: Simplify right side
    64,399.74x = 2,091,303,017.96
  5. Step 5: Solve for x
    x = 2,091,303,017.96/64,399.74
  6. Step 6: Final answer
    x = 32,473.78

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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.