Home / 76,438.64-105,481.80-42,449.31

Finding the Fourth Proportional to 76,438.64, 105,481.80 and 42,449.31

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Solution

The fourth proportional to 76,438.64, 105,481.80 and 42,449.31 is: 58,578.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,438.64 : 105,481.80 = 42,449.31 : x
  2. Step 2: Convert to fraction form
    76,438.64/105,481.80 = 42,449.31/x
  3. Step 3: Cross multiply
    76,438.64x = 105,481.80 × 42,449.31
  4. Step 4: Simplify right side
    76,438.64x = 4,477,629,627.56
  5. Step 5: Solve for x
    x = 4,477,629,627.56/76,438.64
  6. Step 6: Final answer
    x = 58,578.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.