Home / 81,027.36-121,540.32-25,623.36

Finding the Fourth Proportional to 81,027.36, 121,540.32 and 25,623.36

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Solution

The fourth proportional to 81,027.36, 121,540.32 and 25,623.36 is: 38,434.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,027.36 : 121,540.32 = 25,623.36 : x
  2. Step 2: Convert to fraction form
    81,027.36/121,540.32 = 25,623.36/x
  3. Step 3: Cross multiply
    81,027.36x = 121,540.32 × 25,623.36
  4. Step 4: Simplify right side
    81,027.36x = 3,114,271,373.88
  5. Step 5: Solve for x
    x = 3,114,271,373.88/81,027.36
  6. Step 6: Final answer
    x = 38,434.81

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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.