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Finding the Third Proportional to 142,026 and 312,078

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Solution

The third proportional to 142,026 and 312,078 is: 685,738.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,026 : 312,078 = 312,078 : x
  2. Step 2: Convert to fraction form
    142,026/312,078 = 312,078/x
  3. Step 3: Cross multiply
    142,026x = 312,078 × 312,078
  4. Step 4: Simplify right side
    142,026x = 97,392,678,084
  5. Step 5: Solve for x
    x = 97,392,678,084/142,026
  6. Step 6: Final answer
    x = 685,738.37

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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.