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Finding the Fourth Proportional to 172,918.17, 259,404.09 and 73,078.80

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Solution

The fourth proportional to 172,918.17, 259,404.09 and 73,078.80 is: 109,629.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,918.17 : 259,404.09 = 73,078.80 : x
  2. Step 2: Convert to fraction form
    172,918.17/259,404.09 = 73,078.80/x
  3. Step 3: Cross multiply
    172,918.17x = 259,404.09 × 73,078.80
  4. Step 4: Simplify right side
    172,918.17x = 18,956,939,612.29
  5. Step 5: Solve for x
    x = 18,956,939,612.29/172,918.17
  6. Step 6: Final answer
    x = 109,629.54

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1.5x scale

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.