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Finding the Third Proportional to 85,402 and 136,430

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Solution

The third proportional to 85,402 and 136,430 is: 217,947.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,402 : 136,430 = 136,430 : x
  2. Step 2: Convert to fraction form
    85,402/136,430 = 136,430/x
  3. Step 3: Cross multiply
    85,402x = 136,430 × 136,430
  4. Step 4: Simplify right side
    85,402x = 18,613,144,900
  5. Step 5: Solve for x
    x = 18,613,144,900/85,402
  6. Step 6: Final answer
    x = 217,947.41

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.