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Finding the Fourth Proportional to 63,286.92, 87,345 and 39,421.08

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Solution

The fourth proportional to 63,286.92, 87,345 and 39,421.08 is: 54,406.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,286.92 : 87,345 = 39,421.08 : x
  2. Step 2: Convert to fraction form
    63,286.92/87,345 = 39,421.08/x
  3. Step 3: Cross multiply
    63,286.92x = 87,345 × 39,421.08
  4. Step 4: Simplify right side
    63,286.92x = 3,443,234,232.60
  5. Step 5: Solve for x
    x = 3,443,234,232.60/63,286.92
  6. Step 6: Final answer
    x = 54,406.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.