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Finding the Third Proportional to 66,146.75 and 145,140

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Solution

The third proportional to 66,146.75 and 145,140 is: 318,467.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,146.75 : 145,140 = 145,140 : x
  2. Step 2: Convert to fraction form
    66,146.75/145,140 = 145,140/x
  3. Step 3: Cross multiply
    66,146.75x = 145,140 × 145,140
  4. Step 4: Simplify right side
    66,146.75x = 21,065,619,600
  5. Step 5: Solve for x
    x = 21,065,619,600/66,146.75
  6. Step 6: Final answer
    x = 318,467.95

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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.