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Finding the Fourth Proportional to 217,975.20, 326,719.80 and 84,811.20

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Solution

The fourth proportional to 217,975.20, 326,719.80 and 84,811.20 is: 127,122.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,975.20 : 326,719.80 = 84,811.20 : x
  2. Step 2: Convert to fraction form
    217,975.20/326,719.80 = 84,811.20/x
  3. Step 3: Cross multiply
    217,975.20x = 326,719.80 × 84,811.20
  4. Step 4: Simplify right side
    217,975.20x = 27,709,498,301.76
  5. Step 5: Solve for x
    x = 27,709,498,301.76/217,975.20
  6. Step 6: Final answer
    x = 127,122.25

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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.