Home / 129,441.40-178,616.41-75,715.92

Finding the Fourth Proportional to 129,441.40, 178,616.41 and 75,715.92

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Solution

The fourth proportional to 129,441.40, 178,616.41 and 75,715.92 is: 104,480.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,441.40 : 178,616.41 = 75,715.92 : x
  2. Step 2: Convert to fraction form
    129,441.40/178,616.41 = 75,715.92/x
  3. Step 3: Cross multiply
    129,441.40x = 178,616.41 × 75,715.92
  4. Step 4: Simplify right side
    129,441.40x = 13,524,105,620.96
  5. Step 5: Solve for x
    x = 13,524,105,620.96/129,441.40
  6. Step 6: Final answer
    x = 104,480.53

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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.