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Finding the Third Proportional to 78,581 and 121,773

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Solution

The third proportional to 78,581 and 121,773 is: 188,705.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,581 : 121,773 = 121,773 : x
  2. Step 2: Convert to fraction form
    78,581/121,773 = 121,773/x
  3. Step 3: Cross multiply
    78,581x = 121,773 × 121,773
  4. Step 4: Simplify right side
    78,581x = 14,828,663,529
  5. Step 5: Solve for x
    x = 14,828,663,529/78,581
  6. Step 6: Final answer
    x = 188,705.46

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.