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Finding the Fourth Proportional to 217,350.65, 325,874.10 and 128,558.45

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Solution

The fourth proportional to 217,350.65, 325,874.10 and 128,558.45 is: 192,747.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,350.65 : 325,874.10 = 128,558.45 : x
  2. Step 2: Convert to fraction form
    217,350.65/325,874.10 = 128,558.45/x
  3. Step 3: Cross multiply
    217,350.65x = 325,874.10 × 128,558.45
  4. Step 4: Simplify right side
    217,350.65x = 41,893,869,191.15
  5. Step 5: Solve for x
    x = 41,893,869,191.15/217,350.65
  6. Step 6: Final answer
    x = 192,747.84

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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.