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Finding the Third Proportional to 30,153.94 and 66,138.19

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Solution

The third proportional to 30,153.94 and 66,138.19 is: 145,064.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,153.94 : 66,138.19 = 66,138.19 : x
  2. Step 2: Convert to fraction form
    30,153.94/66,138.19 = 66,138.19/x
  3. Step 3: Cross multiply
    30,153.94x = 66,138.19 × 66,138.19
  4. Step 4: Simplify right side
    30,153.94x = 4,374,259,845.79
  5. Step 5: Solve for x
    x = 4,374,259,845.79/30,153.94
  6. Step 6: Final answer
    x = 145,064.30

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.