Home / 81,172.40-121,672.20-31,233.20

Finding the Fourth Proportional to 81,172.40, 121,672.20 and 31,233.20

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Solution

The fourth proportional to 81,172.40, 121,672.20 and 31,233.20 is: 46,816.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,172.40 : 121,672.20 = 31,233.20 : x
  2. Step 2: Convert to fraction form
    81,172.40/121,672.20 = 31,233.20/x
  3. Step 3: Cross multiply
    81,172.40x = 121,672.20 × 31,233.20
  4. Step 4: Simplify right side
    81,172.40x = 3,800,212,157.04
  5. Step 5: Solve for x
    x = 3,800,212,157.04/81,172.40
  6. Step 6: Final answer
    x = 46,816.56

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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.