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Finding the Third Proportional to 64,431.75 and 70,272.75

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Solution

The third proportional to 64,431.75 and 70,272.75 is: 76,643.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,431.75 : 70,272.75 = 70,272.75 : x
  2. Step 2: Convert to fraction form
    64,431.75/70,272.75 = 70,272.75/x
  3. Step 3: Cross multiply
    64,431.75x = 70,272.75 × 70,272.75
  4. Step 4: Simplify right side
    64,431.75x = 4,938,259,392.56
  5. Step 5: Solve for x
    x = 4,938,259,392.56/64,431.75
  6. Step 6: Final answer
    x = 76,643.26

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.