Home / 138,120.37-207,180.56-91,362.31

Finding the Fourth Proportional to 138,120.37, 207,180.56 and 91,362.31

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Solution

The fourth proportional to 138,120.37, 207,180.56 and 91,362.31 is: 137,043.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,120.37 : 207,180.56 = 91,362.31 : x
  2. Step 2: Convert to fraction form
    138,120.37/207,180.56 = 91,362.31/x
  3. Step 3: Cross multiply
    138,120.37x = 207,180.56 × 91,362.31
  4. Step 4: Simplify right side
    138,120.37x = 18,928,493,573.93
  5. Step 5: Solve for x
    x = 18,928,493,573.93/138,120.37
  6. Step 6: Final answer
    x = 137,043.46

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1.5x scale

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.