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Finding the Third Proportional to 66,280 and 145,160

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Solution

The third proportional to 66,280 and 145,160 is: 317,915.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,280 : 145,160 = 145,160 : x
  2. Step 2: Convert to fraction form
    66,280/145,160 = 145,160/x
  3. Step 3: Cross multiply
    66,280x = 145,160 × 145,160
  4. Step 4: Simplify right side
    66,280x = 21,071,425,600
  5. Step 5: Solve for x
    x = 21,071,425,600/66,280
  6. Step 6: Final answer
    x = 317,915.29

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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.