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Finding the Fourth Proportional to 76,992.20, 115,488.30 and 72,326.60

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Solution

The fourth proportional to 76,992.20, 115,488.30 and 72,326.60 is: 108,489.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,992.20 : 115,488.30 = 72,326.60 : x
  2. Step 2: Convert to fraction form
    76,992.20/115,488.30 = 72,326.60/x
  3. Step 3: Cross multiply
    76,992.20x = 115,488.30 × 72,326.60
  4. Step 4: Simplify right side
    76,992.20x = 8,352,876,078.78
  5. Step 5: Solve for x
    x = 8,352,876,078.78/76,992.20
  6. Step 6: Final answer
    x = 108,489.90

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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.