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Finding the Third Proportional to 64,440 and 136,624

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Solution

The third proportional to 64,440 and 136,624 is: 289,666.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,440 : 136,624 = 136,624 : x
  2. Step 2: Convert to fraction form
    64,440/136,624 = 136,624/x
  3. Step 3: Cross multiply
    64,440x = 136,624 × 136,624
  4. Step 4: Simplify right side
    64,440x = 18,666,117,376
  5. Step 5: Solve for x
    x = 18,666,117,376/64,440
  6. Step 6: Final answer
    x = 289,666.63

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.