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Finding the Fourth Proportional to 216,634.32, 324,982.44 and 66,886.92

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Solution

The fourth proportional to 216,634.32, 324,982.44 and 66,886.92 is: 100,339.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,634.32 : 324,982.44 = 66,886.92 : x
  2. Step 2: Convert to fraction form
    216,634.32/324,982.44 = 66,886.92/x
  3. Step 3: Cross multiply
    216,634.32x = 324,982.44 × 66,886.92
  4. Step 4: Simplify right side
    216,634.32x = 21,737,074,465.68
  5. Step 5: Solve for x
    x = 21,737,074,465.68/216,634.32
  6. Step 6: Final answer
    x = 100,339.94

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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.