Home / 81,262.24-121,836.12-31,300.48

Finding the Fourth Proportional to 81,262.24, 121,836.12 and 31,300.48

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Solution

The fourth proportional to 81,262.24, 121,836.12 and 31,300.48 is: 46,928.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,262.24 : 121,836.12 = 31,300.48 : x
  2. Step 2: Convert to fraction form
    81,262.24/121,836.12 = 31,300.48/x
  3. Step 3: Cross multiply
    81,262.24x = 121,836.12 × 31,300.48
  4. Step 4: Simplify right side
    81,262.24x = 3,813,529,037.34
  5. Step 5: Solve for x
    x = 3,813,529,037.34/81,262.24
  6. Step 6: Final answer
    x = 46,928.67

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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.