Home / 81,437.20-122,066.70-28,819.60

Finding the Fourth Proportional to 81,437.20, 122,066.70 and 28,819.60

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Solution

The fourth proportional to 81,437.20, 122,066.70 and 28,819.60 is: 43,197.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,437.20 : 122,066.70 = 28,819.60 : x
  2. Step 2: Convert to fraction form
    81,437.20/122,066.70 = 28,819.60/x
  3. Step 3: Cross multiply
    81,437.20x = 122,066.70 × 28,819.60
  4. Step 4: Simplify right side
    81,437.20x = 3,517,913,467.32
  5. Step 5: Solve for x
    x = 3,517,913,467.32/81,437.20
  6. Step 6: Final answer
    x = 43,197.87

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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.