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Finding the Fourth Proportional to 268,846.80, 403,270.20 and 81,858.30

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Solution

The fourth proportional to 268,846.80, 403,270.20 and 81,858.30 is: 122,787.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,846.80 : 403,270.20 = 81,858.30 : x
  2. Step 2: Convert to fraction form
    268,846.80/403,270.20 = 81,858.30/x
  3. Step 3: Cross multiply
    268,846.80x = 403,270.20 × 81,858.30
  4. Step 4: Simplify right side
    268,846.80x = 33,011,013,012.66
  5. Step 5: Solve for x
    x = 33,011,013,012.66/268,846.80
  6. Step 6: Final answer
    x = 122,787.45

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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.