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Finding the Fourth Proportional to 172,844.60, 259,223.70 and 66,205.40

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Solution

The fourth proportional to 172,844.60, 259,223.70 and 66,205.40 is: 99,291.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,844.60 : 259,223.70 = 66,205.40 : x
  2. Step 2: Convert to fraction form
    172,844.60/259,223.70 = 66,205.40/x
  3. Step 3: Cross multiply
    172,844.60x = 259,223.70 × 66,205.40
  4. Step 4: Simplify right side
    172,844.60x = 17,162,008,747.98
  5. Step 5: Solve for x
    x = 17,162,008,747.98/172,844.60
  6. Step 6: Final answer
    x = 99,291.55

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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.