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Finding the Fourth Proportional to 66,912.12, 100,406.88 and 25,388.28

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Solution

The fourth proportional to 66,912.12, 100,406.88 and 25,388.28 is: 38,097.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,912.12 : 100,406.88 = 25,388.28 : x
  2. Step 2: Convert to fraction form
    66,912.12/100,406.88 = 25,388.28/x
  3. Step 3: Cross multiply
    66,912.12x = 100,406.88 × 25,388.28
  4. Step 4: Simplify right side
    66,912.12x = 2,549,157,983.37
  5. Step 5: Solve for x
    x = 2,549,157,983.37/66,912.12
  6. Step 6: Final answer
    x = 38,097.10

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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.