Home / 78,363.20-117,621.60-38,964.80

Finding the Fourth Proportional to 78,363.20, 117,621.60 and 38,964.80

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Solution

The fourth proportional to 78,363.20, 117,621.60 and 38,964.80 is: 58,485.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,363.20 : 117,621.60 = 38,964.80 : x
  2. Step 2: Convert to fraction form
    78,363.20/117,621.60 = 38,964.80/x
  3. Step 3: Cross multiply
    78,363.20x = 117,621.60 × 38,964.80
  4. Step 4: Simplify right side
    78,363.20x = 4,583,102,119.68
  5. Step 5: Solve for x
    x = 4,583,102,119.68/78,363.20
  6. Step 6: Final answer
    x = 58,485.39

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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.