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Finding the Third Proportional to 63,315 and 138,390

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Solution

The third proportional to 63,315 and 138,390 is: 302,484.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,315 : 138,390 = 138,390 : x
  2. Step 2: Convert to fraction form
    63,315/138,390 = 138,390/x
  3. Step 3: Cross multiply
    63,315x = 138,390 × 138,390
  4. Step 4: Simplify right side
    63,315x = 19,151,792,100
  5. Step 5: Solve for x
    x = 19,151,792,100/63,315
  6. Step 6: Final answer
    x = 302,484.28

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.