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Finding the Fourth Proportional to 66,993.28, 100,489.92 and 39,276.16

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Solution

The fourth proportional to 66,993.28, 100,489.92 and 39,276.16 is: 58,914.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,993.28 : 100,489.92 = 39,276.16 : x
  2. Step 2: Convert to fraction form
    66,993.28/100,489.92 = 39,276.16/x
  3. Step 3: Cross multiply
    66,993.28x = 100,489.92 × 39,276.16
  4. Step 4: Simplify right side
    66,993.28x = 3,946,858,176.31
  5. Step 5: Solve for x
    x = 3,946,858,176.31/66,993.28
  6. Step 6: Final answer
    x = 58,914.24

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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.