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Finding the Fourth Proportional to 66,993.64, 100,490.46 and 25,440.64

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Solution

The fourth proportional to 66,993.64, 100,490.46 and 25,440.64 is: 38,160.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,993.64 : 100,490.46 = 25,440.64 : x
  2. Step 2: Convert to fraction form
    66,993.64/100,490.46 = 25,440.64/x
  3. Step 3: Cross multiply
    66,993.64x = 100,490.46 × 25,440.64
  4. Step 4: Simplify right side
    66,993.64x = 2,556,541,616.29
  5. Step 5: Solve for x
    x = 2,556,541,616.29/66,993.64
  6. Step 6: Final answer
    x = 38,160.96

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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.