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Finding the Fourth Proportional to 217,288.40, 325,835.40 and 84,124.40

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Solution

The fourth proportional to 217,288.40, 325,835.40 and 84,124.40 is: 126,148.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,288.40 : 325,835.40 = 84,124.40 : x
  2. Step 2: Convert to fraction form
    217,288.40/325,835.40 = 84,124.40/x
  3. Step 3: Cross multiply
    217,288.40x = 325,835.40 × 84,124.40
  4. Step 4: Simplify right side
    217,288.40x = 27,410,707,523.76
  5. Step 5: Solve for x
    x = 27,410,707,523.76/217,288.40
  6. Step 6: Final answer
    x = 126,148.97

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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.