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Finding the Fourth Proportional to 172,977.87, 259,477.74 and 73,119.45

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Solution

The fourth proportional to 172,977.87, 259,477.74 and 73,119.45 is: 109,683.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,977.87 : 259,477.74 = 73,119.45 : x
  2. Step 2: Convert to fraction form
    172,977.87/259,477.74 = 73,119.45/x
  3. Step 3: Cross multiply
    172,977.87x = 259,477.74 × 73,119.45
  4. Step 4: Simplify right side
    172,977.87x = 18,972,869,636.04
  5. Step 5: Solve for x
    x = 18,972,869,636.04/172,977.87
  6. Step 6: Final answer
    x = 109,683.80

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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.