Home / 81,418.28-122,128.07-31,504.08

Finding the Fourth Proportional to 81,418.28, 122,128.07 and 31,504.08

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Solution

The fourth proportional to 81,418.28, 122,128.07 and 31,504.08 is: 47,256.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,418.28 : 122,128.07 = 31,504.08 : x
  2. Step 2: Convert to fraction form
    81,418.28/122,128.07 = 31,504.08/x
  3. Step 3: Cross multiply
    81,418.28x = 122,128.07 × 31,504.08
  4. Step 4: Simplify right side
    81,418.28x = 3,847,532,330.01
  5. Step 5: Solve for x
    x = 3,847,532,330.01/81,418.28
  6. Step 6: Final answer
    x = 47,256.37

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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.