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Finding the Fourth Proportional to 262,485.72, 393,786.01 and 85,010.67

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Solution

The fourth proportional to 262,485.72, 393,786.01 and 85,010.67 is: 127,534.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,485.72 : 393,786.01 = 85,010.67 : x
  2. Step 2: Convert to fraction form
    262,485.72/393,786.01 = 85,010.67/x
  3. Step 3: Cross multiply
    262,485.72x = 393,786.01 × 85,010.67
  4. Step 4: Simplify right side
    262,485.72x = 33,476,013,810.90
  5. Step 5: Solve for x
    x = 33,476,013,810.90/262,485.72
  6. Step 6: Final answer
    x = 127,534.61

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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.