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Finding the Third Proportional to 78,237 and 117,729

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Solution

The third proportional to 78,237 and 117,729 is: 177,155.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,237 : 117,729 = 117,729 : x
  2. Step 2: Convert to fraction form
    78,237/117,729 = 117,729/x
  3. Step 3: Cross multiply
    78,237x = 117,729 × 117,729
  4. Step 4: Simplify right side
    78,237x = 13,860,117,441
  5. Step 5: Solve for x
    x = 13,860,117,441/78,237
  6. Step 6: Final answer
    x = 177,155.53

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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.