Home / 138,004.12-206,953.64-90,606.54

Finding the Fourth Proportional to 138,004.12, 206,953.64 and 90,606.54

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Solution

The fourth proportional to 138,004.12, 206,953.64 and 90,606.54 is: 135,875.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,004.12 : 206,953.64 = 90,606.54 : x
  2. Step 2: Convert to fraction form
    138,004.12/206,953.64 = 90,606.54/x
  3. Step 3: Cross multiply
    138,004.12x = 206,953.64 × 90,606.54
  4. Step 4: Simplify right side
    138,004.12x = 18,751,353,260.81
  5. Step 5: Solve for x
    x = 18,751,353,260.81/138,004.12
  6. Step 6: Final answer
    x = 135,875.31

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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.