Home / 81,015.82-121,288.38-47,178.67

Finding the Fourth Proportional to 81,015.82, 121,288.38 and 47,178.67

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Solution

The fourth proportional to 81,015.82, 121,288.38 and 47,178.67 is: 70,630.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,015.82 : 121,288.38 = 47,178.67 : x
  2. Step 2: Convert to fraction form
    81,015.82/121,288.38 = 47,178.67/x
  3. Step 3: Cross multiply
    81,015.82x = 121,288.38 × 47,178.67
  4. Step 4: Simplify right side
    81,015.82x = 5,722,224,454.85
  5. Step 5: Solve for x
    x = 5,722,224,454.85/81,015.82
  6. Step 6: Final answer
    x = 70,630.95

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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.