Home / 81,888.51-113,067.74-80,580.66

Finding the Fourth Proportional to 81,888.51, 113,067.74 and 80,580.66

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Solution

The fourth proportional to 81,888.51, 113,067.74 and 80,580.66 is: 111,261.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,888.51 : 113,067.74 = 80,580.66 : x
  2. Step 2: Convert to fraction form
    81,888.51/113,067.74 = 80,580.66/x
  3. Step 3: Cross multiply
    81,888.51x = 113,067.74 × 80,580.66
  4. Step 4: Simplify right side
    81,888.51x = 9,111,073,113.91
  5. Step 5: Solve for x
    x = 9,111,073,113.91/81,888.51
  6. Step 6: Final answer
    x = 111,261.92

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1.5x scale

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.