Home / 281,087.02-421,692.09-81,415.54

Finding the Fourth Proportional to 281,087.02, 421,692.09 and 81,415.54

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Solution

The fourth proportional to 281,087.02, 421,692.09 and 81,415.54 is: 122,141.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,087.02 : 421,692.09 = 81,415.54 : x
  2. Step 2: Convert to fraction form
    281,087.02/421,692.09 = 81,415.54/x
  3. Step 3: Cross multiply
    281,087.02x = 421,692.09 × 81,415.54
  4. Step 4: Simplify right side
    281,087.02x = 34,332,289,221.08
  5. Step 5: Solve for x
    x = 34,332,289,221.08/281,087.02
  6. Step 6: Final answer
    x = 122,141.14

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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.