Home / 70,418.24-105,636.48-28,855.36

Finding the Fourth Proportional to 70,418.24, 105,636.48 and 28,855.36

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Solution

The fourth proportional to 70,418.24, 105,636.48 and 28,855.36 is: 43,286.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,418.24 : 105,636.48 = 28,855.36 : x
  2. Step 2: Convert to fraction form
    70,418.24/105,636.48 = 28,855.36/x
  3. Step 3: Cross multiply
    70,418.24x = 105,636.48 × 28,855.36
  4. Step 4: Simplify right side
    70,418.24x = 3,048,178,659.53
  5. Step 5: Solve for x
    x = 3,048,178,659.53/70,418.24
  6. Step 6: Final answer
    x = 43,286.78

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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.