Home / 121,731.24-167,721.78-90,975.54

Finding the Fourth Proportional to 121,731.24, 167,721.78 and 90,975.54

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Solution

The fourth proportional to 121,731.24, 167,721.78 and 90,975.54 is: 125,346.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,731.24 : 167,721.78 = 90,975.54 : x
  2. Step 2: Convert to fraction form
    121,731.24/167,721.78 = 90,975.54/x
  3. Step 3: Cross multiply
    121,731.24x = 167,721.78 × 90,975.54
  4. Step 4: Simplify right side
    121,731.24x = 15,258,579,505.26
  5. Step 5: Solve for x
    x = 15,258,579,505.26/121,731.24
  6. Step 6: Final answer
    x = 125,346.46

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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.