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Finding the Fourth Proportional to 128,698.66, 193,072.26 and 48,760.60

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Solution

The fourth proportional to 128,698.66, 193,072.26 and 48,760.60 is: 73,150.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,698.66 : 193,072.26 = 48,760.60 : x
  2. Step 2: Convert to fraction form
    128,698.66/193,072.26 = 48,760.60/x
  3. Step 3: Cross multiply
    128,698.66x = 193,072.26 × 48,760.60
  4. Step 4: Simplify right side
    128,698.66x = 9,414,319,240.96
  5. Step 5: Solve for x
    x = 9,414,319,240.96/128,698.66
  6. Step 6: Final answer
    x = 73,150.10

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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.