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Finding the Third Proportional to 30,258.50 and 66,490

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Solution

The third proportional to 30,258.50 and 66,490 is: 146,105.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,258.50 : 66,490 = 66,490 : x
  2. Step 2: Convert to fraction form
    30,258.50/66,490 = 66,490/x
  3. Step 3: Cross multiply
    30,258.50x = 66,490 × 66,490
  4. Step 4: Simplify right side
    30,258.50x = 4,420,920,100
  5. Step 5: Solve for x
    x = 4,420,920,100/30,258.50
  6. Step 6: Final answer
    x = 146,105.06

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.