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Finding the Fourth Proportional to 138,485.48, 190,848.97 and 100,179.97

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Solution

The fourth proportional to 138,485.48, 190,848.97 and 100,179.97 is: 138,059.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,485.48 : 190,848.97 = 100,179.97 : x
  2. Step 2: Convert to fraction form
    138,485.48/190,848.97 = 100,179.97/x
  3. Step 3: Cross multiply
    138,485.48x = 190,848.97 × 100,179.97
  4. Step 4: Simplify right side
    138,485.48x = 19,119,243,361.56
  5. Step 5: Solve for x
    x = 19,119,243,361.56/138,485.48
  6. Step 6: Final answer
    x = 138,059.56

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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.