Home / 81,345.30-121,996.35-25,185.30

Finding the Fourth Proportional to 81,345.30, 121,996.35 and 25,185.30

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Solution

The fourth proportional to 81,345.30, 121,996.35 and 25,185.30 is: 37,771.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,345.30 : 121,996.35 = 25,185.30 : x
  2. Step 2: Convert to fraction form
    81,345.30/121,996.35 = 25,185.30/x
  3. Step 3: Cross multiply
    81,345.30x = 121,996.35 × 25,185.30
  4. Step 4: Simplify right side
    81,345.30x = 3,072,514,673.66
  5. Step 5: Solve for x
    x = 3,072,514,673.66/81,345.30
  6. Step 6: Final answer
    x = 37,771.26

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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.