Home / 81,987.40-113,185.26-55,270.36

Finding the Fourth Proportional to 81,987.40, 113,185.26 and 55,270.36

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Solution

The fourth proportional to 81,987.40, 113,185.26 and 55,270.36 is: 76,301.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,987.40 : 113,185.26 = 55,270.36 : x
  2. Step 2: Convert to fraction form
    81,987.40/113,185.26 = 55,270.36/x
  3. Step 3: Cross multiply
    81,987.40x = 113,185.26 × 55,270.36
  4. Step 4: Simplify right side
    81,987.40x = 6,255,790,066.89
  5. Step 5: Solve for x
    x = 6,255,790,066.89/81,987.40
  6. Step 6: Final answer
    x = 76,301.85

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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.