Home / 120,968.40-181,258.20-101,139.60

Finding the Fourth Proportional to 120,968.40, 181,258.20 and 101,139.60

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Solution

The fourth proportional to 120,968.40, 181,258.20 and 101,139.60 is: 151,546.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,968.40 : 181,258.20 = 101,139.60 : x
  2. Step 2: Convert to fraction form
    120,968.40/181,258.20 = 101,139.60/x
  3. Step 3: Cross multiply
    120,968.40x = 181,258.20 × 101,139.60
  4. Step 4: Simplify right side
    120,968.40x = 18,332,381,844.72
  5. Step 5: Solve for x
    x = 18,332,381,844.72/120,968.40
  6. Step 6: Final answer
    x = 151,546.87

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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.