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Finding the Fourth Proportional to 262,122, 393,183 and 87,018

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Solution

The fourth proportional to 262,122, 393,183 and 87,018 is: 130,527

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,122 : 393,183 = 87,018 : x
  2. Step 2: Convert to fraction form
    262,122/393,183 = 87,018/x
  3. Step 3: Cross multiply
    262,122x = 393,183 × 87,018
  4. Step 4: Simplify right side
    262,122x = 34,213,998,294
  5. Step 5: Solve for x
    x = 34,213,998,294/262,122
  6. Step 6: Final answer
    x = 130,527

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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.