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Finding the Fourth Proportional to 210,178.40, 315,559.20 and 131,446.40

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Solution

The fourth proportional to 210,178.40, 315,559.20 and 131,446.40 is: 197,351.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,178.40 : 315,559.20 = 131,446.40 : x
  2. Step 2: Convert to fraction form
    210,178.40/315,559.20 = 131,446.40/x
  3. Step 3: Cross multiply
    210,178.40x = 315,559.20 × 131,446.40
  4. Step 4: Simplify right side
    210,178.40x = 41,479,120,826.88
  5. Step 5: Solve for x
    x = 41,479,120,826.88/210,178.40
  6. Step 6: Final answer
    x = 197,351.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.