Home / 78,076.27-117,114.30-18,911.78

Finding the Fourth Proportional to 78,076.27, 117,114.30 and 18,911.78

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Solution

The fourth proportional to 78,076.27, 117,114.30 and 18,911.78 is: 28,367.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,076.27 : 117,114.30 = 18,911.78 : x
  2. Step 2: Convert to fraction form
    78,076.27/117,114.30 = 18,911.78/x
  3. Step 3: Cross multiply
    78,076.27x = 117,114.30 × 18,911.78
  4. Step 4: Simplify right side
    78,076.27x = 2,214,839,730.06
  5. Step 5: Solve for x
    x = 2,214,839,730.06/78,076.27
  6. Step 6: Final answer
    x = 28,367.64

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1.5x scale

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.