Home / 129,990.40-179,383.51-72,626.20

Finding the Fourth Proportional to 129,990.40, 179,383.51 and 72,626.20

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Solution

The fourth proportional to 129,990.40, 179,383.51 and 72,626.20 is: 100,222.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,990.40 : 179,383.51 = 72,626.20 : x
  2. Step 2: Convert to fraction form
    129,990.40/179,383.51 = 72,626.20/x
  3. Step 3: Cross multiply
    129,990.40x = 179,383.51 × 72,626.20
  4. Step 4: Simplify right side
    129,990.40x = 13,027,942,673.96
  5. Step 5: Solve for x
    x = 13,027,942,673.96/129,990.40
  6. Step 6: Final answer
    x = 100,222.34

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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.