Home / 143,143.72-197,537.30-79,481.76

Finding the Fourth Proportional to 143,143.72, 197,537.30 and 79,481.76

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Solution

The fourth proportional to 143,143.72, 197,537.30 and 79,481.76 is: 109,684.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,143.72 : 197,537.30 = 79,481.76 : x
  2. Step 2: Convert to fraction form
    143,143.72/197,537.30 = 79,481.76/x
  3. Step 3: Cross multiply
    143,143.72x = 197,537.30 × 79,481.76
  4. Step 4: Simplify right side
    143,143.72x = 15,700,612,269.65
  5. Step 5: Solve for x
    x = 15,700,612,269.65/143,143.72
  6. Step 6: Final answer
    x = 109,684.25

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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.