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Finding the Third Proportional to 78,290 and 117,459

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Solution

The third proportional to 78,290 and 117,459 is: 176,224.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,290 : 117,459 = 117,459 : x
  2. Step 2: Convert to fraction form
    78,290/117,459 = 117,459/x
  3. Step 3: Cross multiply
    78,290x = 117,459 × 117,459
  4. Step 4: Simplify right side
    78,290x = 13,796,616,681
  5. Step 5: Solve for x
    x = 13,796,616,681/78,290
  6. Step 6: Final answer
    x = 176,224.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.