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Finding the Fourth Proportional to 216,630.12, 324,915.12 and 66,875.34

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Solution

The fourth proportional to 216,630.12, 324,915.12 and 66,875.34 is: 100,303.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,630.12 : 324,915.12 = 66,875.34 : x
  2. Step 2: Convert to fraction form
    216,630.12/324,915.12 = 66,875.34/x
  3. Step 3: Cross multiply
    216,630.12x = 324,915.12 × 66,875.34
  4. Step 4: Simplify right side
    216,630.12x = 21,728,809,121.14
  5. Step 5: Solve for x
    x = 21,728,809,121.14/216,630.12
  6. Step 6: Final answer
    x = 100,303.73

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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.