Home / 76,940.20-115,410.30-72,274.60

Finding the Fourth Proportional to 76,940.20, 115,410.30 and 72,274.60

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Solution

The fourth proportional to 76,940.20, 115,410.30 and 72,274.60 is: 108,411.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,940.20 : 115,410.30 = 72,274.60 : x
  2. Step 2: Convert to fraction form
    76,940.20/115,410.30 = 72,274.60/x
  3. Step 3: Cross multiply
    76,940.20x = 115,410.30 × 72,274.60
  4. Step 4: Simplify right side
    76,940.20x = 8,341,233,268.38
  5. Step 5: Solve for x
    x = 8,341,233,268.38/76,940.20
  6. Step 6: Final answer
    x = 108,411.90

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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.