Home / 78,244.05-117,336.60-28,311.80

Finding the Fourth Proportional to 78,244.05, 117,336.60 and 28,311.80

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Solution

The fourth proportional to 78,244.05, 117,336.60 and 28,311.80 is: 42,457.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,244.05 : 117,336.60 = 28,311.80 : x
  2. Step 2: Convert to fraction form
    78,244.05/117,336.60 = 28,311.80/x
  3. Step 3: Cross multiply
    78,244.05x = 117,336.60 × 28,311.80
  4. Step 4: Simplify right side
    78,244.05x = 3,322,009,765.20
  5. Step 5: Solve for x
    x = 3,322,009,765.20/78,244.05
  6. Step 6: Final answer
    x = 42,457.03

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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.