Home / 81,441.20-122,129.40-28,823.60

Finding the Fourth Proportional to 81,441.20, 122,129.40 and 28,823.60

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Solution

The fourth proportional to 81,441.20, 122,129.40 and 28,823.60 is: 43,223.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,441.20 : 122,129.40 = 28,823.60 : x
  2. Step 2: Convert to fraction form
    81,441.20/122,129.40 = 28,823.60/x
  3. Step 3: Cross multiply
    81,441.20x = 122,129.40 × 28,823.60
  4. Step 4: Simplify right side
    81,441.20x = 3,520,208,973.84
  5. Step 5: Solve for x
    x = 3,520,208,973.84/81,441.20
  6. Step 6: Final answer
    x = 43,223.93

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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.