Home / 81,900.36-122,777.42-31,968.81

Finding the Fourth Proportional to 81,900.36, 122,777.42 and 31,968.81

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Solution

The fourth proportional to 81,900.36, 122,777.42 and 31,968.81 is: 47,924.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,900.36 : 122,777.42 = 31,968.81 : x
  2. Step 2: Convert to fraction form
    81,900.36/122,777.42 = 31,968.81/x
  3. Step 3: Cross multiply
    81,900.36x = 122,777.42 × 31,968.81
  4. Step 4: Simplify right side
    81,900.36x = 3,925,047,852.43
  5. Step 5: Solve for x
    x = 3,925,047,852.43/81,900.36
  6. Step 6: Final answer
    x = 47,924.67

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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.