Home / 81,336.40-122,004.60-31,418.80

Finding the Fourth Proportional to 81,336.40, 122,004.60 and 31,418.80

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Solution

The fourth proportional to 81,336.40, 122,004.60 and 31,418.80 is: 47,128.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,336.40 : 122,004.60 = 31,418.80 : x
  2. Step 2: Convert to fraction form
    81,336.40/122,004.60 = 31,418.80/x
  3. Step 3: Cross multiply
    81,336.40x = 122,004.60 × 31,418.80
  4. Step 4: Simplify right side
    81,336.40x = 3,833,238,126.48
  5. Step 5: Solve for x
    x = 3,833,238,126.48/81,336.40
  6. Step 6: Final answer
    x = 47,128.20

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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.