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Finding the Fourth Proportional to 172,998.96, 259,375.40 and 66,292.50

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Solution

The fourth proportional to 172,998.96, 259,375.40 and 66,292.50 is: 99,391.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,998.96 : 259,375.40 = 66,292.50 : x
  2. Step 2: Convert to fraction form
    172,998.96/259,375.40 = 66,292.50/x
  3. Step 3: Cross multiply
    172,998.96x = 259,375.40 × 66,292.50
  4. Step 4: Simplify right side
    172,998.96x = 17,194,643,704.50
  5. Step 5: Solve for x
    x = 17,194,643,704.50/172,998.96
  6. Step 6: Final answer
    x = 99,391.60

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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.