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Finding the Third Proportional to 66,547 and 142,830

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Solution

The third proportional to 66,547 and 142,830 is: 306,556.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,547 : 142,830 = 142,830 : x
  2. Step 2: Convert to fraction form
    66,547/142,830 = 142,830/x
  3. Step 3: Cross multiply
    66,547x = 142,830 × 142,830
  4. Step 4: Simplify right side
    66,547x = 20,400,408,900
  5. Step 5: Solve for x
    x = 20,400,408,900/66,547
  6. Step 6: Final answer
    x = 306,556.40

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.