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Finding the Third Proportional to 142,457 and 221,455.75

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Solution

The third proportional to 142,457 and 221,455.75 is: 344,262.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,457 : 221,455.75 = 221,455.75 : x
  2. Step 2: Convert to fraction form
    142,457/221,455.75 = 221,455.75/x
  3. Step 3: Cross multiply
    142,457x = 221,455.75 × 221,455.75
  4. Step 4: Simplify right side
    142,457x = 49,042,649,208.06
  5. Step 5: Solve for x
    x = 49,042,649,208.06/142,457
  6. Step 6: Final answer
    x = 344,262.82

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.