Home / 143,186.72-197,601.78-79,528.62

Finding the Fourth Proportional to 143,186.72, 197,601.78 and 79,528.62

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Solution

The fourth proportional to 143,186.72, 197,601.78 and 79,528.62 is: 109,751.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,186.72 : 197,601.78 = 79,528.62 : x
  2. Step 2: Convert to fraction form
    143,186.72/197,601.78 = 79,528.62/x
  3. Step 3: Cross multiply
    143,186.72x = 197,601.78 × 79,528.62
  4. Step 4: Simplify right side
    143,186.72x = 15,714,996,872.94
  5. Step 5: Solve for x
    x = 15,714,996,872.94/143,186.72
  6. Step 6: Final answer
    x = 109,751.78

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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.