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Finding the Third Proportional to 66,389.50 and 143,343.50

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Solution

The third proportional to 66,389.50 and 143,343.50 is: 309,497.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,389.50 : 143,343.50 = 143,343.50 : x
  2. Step 2: Convert to fraction form
    66,389.50/143,343.50 = 143,343.50/x
  3. Step 3: Cross multiply
    66,389.50x = 143,343.50 × 143,343.50
  4. Step 4: Simplify right side
    66,389.50x = 20,547,358,992.25
  5. Step 5: Solve for x
    x = 20,547,358,992.25/66,389.50
  6. Step 6: Final answer
    x = 309,497.12

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.