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Finding the Fourth Proportional to 262,124, 393,186 and 87,020

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Solution

The fourth proportional to 262,124, 393,186 and 87,020 is: 130,530

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,124 : 393,186 = 87,020 : x
  2. Step 2: Convert to fraction form
    262,124/393,186 = 87,020/x
  3. Step 3: Cross multiply
    262,124x = 393,186 × 87,020
  4. Step 4: Simplify right side
    262,124x = 34,215,045,720
  5. Step 5: Solve for x
    x = 34,215,045,720/262,124
  6. Step 6: Final answer
    x = 130,530

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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.