Home / 129,212.82-178,311.78-72,623.79

Finding the Fourth Proportional to 129,212.82, 178,311.78 and 72,623.79

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Solution

The fourth proportional to 129,212.82, 178,311.78 and 72,623.79 is: 100,219.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,212.82 : 178,311.78 = 72,623.79 : x
  2. Step 2: Convert to fraction form
    129,212.82/178,311.78 = 72,623.79/x
  3. Step 3: Cross multiply
    129,212.82x = 178,311.78 × 72,623.79
  4. Step 4: Simplify right side
    129,212.82x = 12,949,677,265.25
  5. Step 5: Solve for x
    x = 12,949,677,265.25/129,212.82
  6. Step 6: Final answer
    x = 100,219.76

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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.