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Finding the Third Proportional to 103,639 and 122,776

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Solution

The third proportional to 103,639 and 122,776 is: 145,446.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,639 : 122,776 = 122,776 : x
  2. Step 2: Convert to fraction form
    103,639/122,776 = 122,776/x
  3. Step 3: Cross multiply
    103,639x = 122,776 × 122,776
  4. Step 4: Simplify right side
    103,639x = 15,073,946,176
  5. Step 5: Solve for x
    x = 15,073,946,176/103,639
  6. Step 6: Final answer
    x = 145,446.66

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.