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Finding the Fourth Proportional to 149,969.98, 225,011.79 and 90,040.31

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Solution

The fourth proportional to 149,969.98, 225,011.79 and 90,040.31 is: 135,094.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,969.98 : 225,011.79 = 90,040.31 : x
  2. Step 2: Convert to fraction form
    149,969.98/225,011.79 = 90,040.31/x
  3. Step 3: Cross multiply
    149,969.98x = 225,011.79 × 90,040.31
  4. Step 4: Simplify right side
    149,969.98x = 20,260,131,325.25
  5. Step 5: Solve for x
    x = 20,260,131,325.25/149,969.98
  6. Step 6: Final answer
    x = 135,094.58

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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.