Home / 138,285.45-190,857.75-80,134.04

Finding the Fourth Proportional to 138,285.45, 190,857.75 and 80,134.04

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Solution

The fourth proportional to 138,285.45, 190,857.75 and 80,134.04 is: 110,598.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,285.45 : 190,857.75 = 80,134.04 : x
  2. Step 2: Convert to fraction form
    138,285.45/190,857.75 = 80,134.04/x
  3. Step 3: Cross multiply
    138,285.45x = 190,857.75 × 80,134.04
  4. Step 4: Simplify right side
    138,285.45x = 15,294,201,618.52
  5. Step 5: Solve for x
    x = 15,294,201,618.52/138,285.45
  6. Step 6: Final answer
    x = 110,598.78

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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.