Home / 81,888.32-113,067.48-80,580.47

Finding the Fourth Proportional to 81,888.32, 113,067.48 and 80,580.47

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Solution

The fourth proportional to 81,888.32, 113,067.48 and 80,580.47 is: 111,261.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,888.32 : 113,067.48 = 80,580.47 : x
  2. Step 2: Convert to fraction form
    81,888.32/113,067.48 = 80,580.47/x
  3. Step 3: Cross multiply
    81,888.32x = 113,067.48 × 80,580.47
  4. Step 4: Simplify right side
    81,888.32x = 9,111,030,599.69
  5. Step 5: Solve for x
    x = 9,111,030,599.69/81,888.32
  6. Step 6: Final answer
    x = 111,261.67

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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.