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Finding the Fourth Proportional to 217,485.72, 300,129.68 and 120,704.19

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Solution

The fourth proportional to 217,485.72, 300,129.68 and 120,704.19 is: 166,571.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,485.72 : 300,129.68 = 120,704.19 : x
  2. Step 2: Convert to fraction form
    217,485.72/300,129.68 = 120,704.19/x
  3. Step 3: Cross multiply
    217,485.72x = 300,129.68 × 120,704.19
  4. Step 4: Simplify right side
    217,485.72x = 36,226,908,418.71
  5. Step 5: Solve for x
    x = 36,226,908,418.71/217,485.72
  6. Step 6: Final answer
    x = 166,571.43

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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.