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Finding the Third Proportional to 64,639 and 99,321

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Solution

The third proportional to 64,639 and 99,321 is: 152,611.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,639 : 99,321 = 99,321 : x
  2. Step 2: Convert to fraction form
    64,639/99,321 = 99,321/x
  3. Step 3: Cross multiply
    64,639x = 99,321 × 99,321
  4. Step 4: Simplify right side
    64,639x = 9,864,661,041
  5. Step 5: Solve for x
    x = 9,864,661,041/64,639
  6. Step 6: Final answer
    x = 152,611.60

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.