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Finding the Fourth Proportional to 216,616.33, 324,928.95 and 66,856.72

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Solution

The fourth proportional to 216,616.33, 324,928.95 and 66,856.72 is: 100,286.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,616.33 : 324,928.95 = 66,856.72 : x
  2. Step 2: Convert to fraction form
    216,616.33/324,928.95 = 66,856.72/x
  3. Step 3: Cross multiply
    216,616.33x = 324,928.95 × 66,856.72
  4. Step 4: Simplify right side
    216,616.33x = 21,723,683,830.04
  5. Step 5: Solve for x
    x = 21,723,683,830.04/216,616.33
  6. Step 6: Final answer
    x = 100,286.45

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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.