Home / 138,128.20-207,192.30-49,384.60

Finding the Fourth Proportional to 138,128.20, 207,192.30 and 49,384.60

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Solution

The fourth proportional to 138,128.20, 207,192.30 and 49,384.60 is: 74,076.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,128.20 : 207,192.30 = 49,384.60 : x
  2. Step 2: Convert to fraction form
    138,128.20/207,192.30 = 49,384.60/x
  3. Step 3: Cross multiply
    138,128.20x = 207,192.30 × 49,384.60
  4. Step 4: Simplify right side
    138,128.20x = 10,232,108,858.58
  5. Step 5: Solve for x
    x = 10,232,108,858.58/138,128.20
  6. Step 6: Final answer
    x = 74,076.90

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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.