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Finding the Fourth Proportional to 172,989.14, 259,405.79 and 73,097.91

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Solution

The fourth proportional to 172,989.14, 259,405.79 and 73,097.91 is: 109,613.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,989.14 : 259,405.79 = 73,097.91 : x
  2. Step 2: Convert to fraction form
    172,989.14/259,405.79 = 73,097.91/x
  3. Step 3: Cross multiply
    172,989.14x = 259,405.79 × 73,097.91
  4. Step 4: Simplify right side
    172,989.14x = 18,962,020,725.41
  5. Step 5: Solve for x
    x = 18,962,020,725.41/172,989.14
  6. Step 6: Final answer
    x = 109,613.94

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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.