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Finding the Third Proportional to 78,468 and 120,057

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Solution

The third proportional to 78,468 and 120,057 is: 183,688.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,468 : 120,057 = 120,057 : x
  2. Step 2: Convert to fraction form
    78,468/120,057 = 120,057/x
  3. Step 3: Cross multiply
    78,468x = 120,057 × 120,057
  4. Step 4: Simplify right side
    78,468x = 14,413,683,249
  5. Step 5: Solve for x
    x = 14,413,683,249/78,468
  6. Step 6: Final answer
    x = 183,688.68

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.