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Finding the Fourth Proportional to 262,040.80, 393,061.20 and 122,072.80

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Solution

The fourth proportional to 262,040.80, 393,061.20 and 122,072.80 is: 183,109.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,040.80 : 393,061.20 = 122,072.80 : x
  2. Step 2: Convert to fraction form
    262,040.80/393,061.20 = 122,072.80/x
  3. Step 3: Cross multiply
    262,040.80x = 393,061.20 × 122,072.80
  4. Step 4: Simplify right side
    262,040.80x = 47,982,081,255.36
  5. Step 5: Solve for x
    x = 47,982,081,255.36/262,040.80
  6. Step 6: Final answer
    x = 183,109.20

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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.