Home / 318,865.20-478,365.26-105,621.03

Finding the Fourth Proportional to 318,865.20, 478,365.26 and 105,621.03

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Solution

The fourth proportional to 318,865.20, 478,365.26 and 105,621.03 is: 158,453.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,865.20 : 478,365.26 = 105,621.03 : x
  2. Step 2: Convert to fraction form
    318,865.20/478,365.26 = 105,621.03/x
  3. Step 3: Cross multiply
    318,865.20x = 478,365.26 × 105,621.03
  4. Step 4: Simplify right side
    318,865.20x = 50,525,431,477.42
  5. Step 5: Solve for x
    x = 50,525,431,477.42/318,865.20
  6. Step 6: Final answer
    x = 158,453.89

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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.