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Finding the Fourth Proportional to 66,957.32, 100,436.76 and 20,212.16

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Solution

The fourth proportional to 66,957.32, 100,436.76 and 20,212.16 is: 30,318.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,957.32 : 100,436.76 = 20,212.16 : x
  2. Step 2: Convert to fraction form
    66,957.32/100,436.76 = 20,212.16/x
  3. Step 3: Cross multiply
    66,957.32x = 100,436.76 × 20,212.16
  4. Step 4: Simplify right side
    66,957.32x = 2,030,043,863.00
  5. Step 5: Solve for x
    x = 2,030,043,863.00/66,957.32
  6. Step 6: Final answer
    x = 30,318.48

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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.