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Finding the Fourth Proportional to 71,958.30, 107,968.47 and 38,639.40

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Solution

The fourth proportional to 71,958.30, 107,968.47 and 38,639.40 is: 57,975.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,958.30 : 107,968.47 = 38,639.40 : x
  2. Step 2: Convert to fraction form
    71,958.30/107,968.47 = 38,639.40/x
  3. Step 3: Cross multiply
    71,958.30x = 107,968.47 × 38,639.40
  4. Step 4: Simplify right side
    71,958.30x = 4,171,836,899.72
  5. Step 5: Solve for x
    x = 4,171,836,899.72/71,958.30
  6. Step 6: Final answer
    x = 57,975.76

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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.