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Finding the Fourth Proportional to 217,336.65, 325,853.10 and 128,544.45

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Solution

The fourth proportional to 217,336.65, 325,853.10 and 128,544.45 is: 192,726.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,336.65 : 325,853.10 = 128,544.45 : x
  2. Step 2: Convert to fraction form
    217,336.65/325,853.10 = 128,544.45/x
  3. Step 3: Cross multiply
    217,336.65x = 325,853.10 × 128,544.45
  4. Step 4: Simplify right side
    217,336.65x = 41,886,607,520.30
  5. Step 5: Solve for x
    x = 41,886,607,520.30/217,336.65
  6. Step 6: Final answer
    x = 192,726.85

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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.