Home / 121,399.41-167,471.64-81,123.06

Finding the Fourth Proportional to 121,399.41, 167,471.64 and 81,123.06

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Solution

The fourth proportional to 121,399.41, 167,471.64 and 81,123.06 is: 111,910.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,399.41 : 167,471.64 = 81,123.06 : x
  2. Step 2: Convert to fraction form
    121,399.41/167,471.64 = 81,123.06/x
  3. Step 3: Cross multiply
    121,399.41x = 167,471.64 × 81,123.06
  4. Step 4: Simplify right side
    121,399.41x = 13,585,811,900.02
  5. Step 5: Solve for x
    x = 13,585,811,900.02/121,399.41
  6. Step 6: Final answer
    x = 111,910.03

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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.