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Finding the Third Proportional to 66,690 and 148,140

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Solution

The third proportional to 66,690 and 148,140 is: 329,066.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,690 : 148,140 = 148,140 : x
  2. Step 2: Convert to fraction form
    66,690/148,140 = 148,140/x
  3. Step 3: Cross multiply
    66,690x = 148,140 × 148,140
  4. Step 4: Simplify right side
    66,690x = 21,945,459,600
  5. Step 5: Solve for x
    x = 21,945,459,600/66,690
  6. Step 6: Final answer
    x = 329,066.72

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Why These Related Problems?

These problems maintain the same ratio (2.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.