Home / 210,540.36-290,542.20-115,045

Finding the Fourth Proportional to 210,540.36, 290,542.20 and 115,045

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Solution

The fourth proportional to 210,540.36, 290,542.20 and 115,045 is: 158,760.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,540.36 : 290,542.20 = 115,045 : x
  2. Step 2: Convert to fraction form
    210,540.36/290,542.20 = 115,045/x
  3. Step 3: Cross multiply
    210,540.36x = 290,542.20 × 115,045
  4. Step 4: Simplify right side
    210,540.36x = 33,425,427,399
  5. Step 5: Solve for x
    x = 33,425,427,399/210,540.36
  6. Step 6: Final answer
    x = 158,760.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.