Home / 81,280.26-121,944.42-34,536.78

Finding the Fourth Proportional to 81,280.26, 121,944.42 and 34,536.78

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Solution

The fourth proportional to 81,280.26, 121,944.42 and 34,536.78 is: 51,815.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,280.26 : 121,944.42 = 34,536.78 : x
  2. Step 2: Convert to fraction form
    81,280.26/121,944.42 = 34,536.78/x
  3. Step 3: Cross multiply
    81,280.26x = 121,944.42 × 34,536.78
  4. Step 4: Simplify right side
    81,280.26x = 4,211,567,605.77
  5. Step 5: Solve for x
    x = 4,211,567,605.77/81,280.26
  6. Step 6: Final answer
    x = 51,815.38

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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.