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Finding the Fourth Proportional to 100,639.86, 150,964.92 and 25,760.64

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Solution

The fourth proportional to 100,639.86, 150,964.92 and 25,760.64 is: 38,642.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,639.86 : 150,964.92 = 25,760.64 : x
  2. Step 2: Convert to fraction form
    100,639.86/150,964.92 = 25,760.64/x
  3. Step 3: Cross multiply
    100,639.86x = 150,964.92 × 25,760.64
  4. Step 4: Simplify right side
    100,639.86x = 3,888,952,956.75
  5. Step 5: Solve for x
    x = 3,888,952,956.75/100,639.86
  6. Step 6: Final answer
    x = 38,642.27

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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.