Home / 199,905.80-299,749.35-81,443.30

Finding the Fourth Proportional to 199,905.80, 299,749.35 and 81,443.30

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Solution

The fourth proportional to 199,905.80, 299,749.35 and 81,443.30 is: 122,120.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,905.80 : 299,749.35 = 81,443.30 : x
  2. Step 2: Convert to fraction form
    199,905.80/299,749.35 = 81,443.30/x
  3. Step 3: Cross multiply
    199,905.80x = 299,749.35 × 81,443.30
  4. Step 4: Simplify right side
    199,905.80x = 24,412,576,236.86
  5. Step 5: Solve for x
    x = 24,412,576,236.86/199,905.80
  6. Step 6: Final answer
    x = 122,120.40

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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.