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Finding the Fourth Proportional to 78,812.28, 108,745.02 and 50,143.32

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Solution

The fourth proportional to 78,812.28, 108,745.02 and 50,143.32 is: 69,187.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,812.28 : 108,745.02 = 50,143.32 : x
  2. Step 2: Convert to fraction form
    78,812.28/108,745.02 = 50,143.32/x
  3. Step 3: Cross multiply
    78,812.28x = 108,745.02 × 50,143.32
  4. Step 4: Simplify right side
    78,812.28x = 5,452,836,336.27
  5. Step 5: Solve for x
    x = 5,452,836,336.27/78,812.28
  6. Step 6: Final answer
    x = 69,187.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.