Home / 81,023.19-121,554.38-30,422.67

Finding the Fourth Proportional to 81,023.19, 121,554.38 and 30,422.67

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Solution

The fourth proportional to 81,023.19, 121,554.38 and 30,422.67 is: 45,641.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,023.19 : 121,554.38 = 30,422.67 : x
  2. Step 2: Convert to fraction form
    81,023.19/121,554.38 = 30,422.67/x
  3. Step 3: Cross multiply
    81,023.19x = 121,554.38 × 30,422.67
  4. Step 4: Simplify right side
    81,023.19x = 3,698,008,789.79
  5. Step 5: Solve for x
    x = 3,698,008,789.79/81,023.19
  6. Step 6: Final answer
    x = 45,641.36

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1.5x scale

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.