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Finding the Fourth Proportional to 80,394.08, 120,689.52 and 77,222.92

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Solution

The fourth proportional to 80,394.08, 120,689.52 and 77,222.92 is: 115,928.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,394.08 : 120,689.52 = 77,222.92 : x
  2. Step 2: Convert to fraction form
    80,394.08/120,689.52 = 77,222.92/x
  3. Step 3: Cross multiply
    80,394.08x = 120,689.52 × 77,222.92
  4. Step 4: Simplify right side
    80,394.08x = 9,319,997,147.80
  5. Step 5: Solve for x
    x = 9,319,997,147.80/80,394.08
  6. Step 6: Final answer
    x = 115,928.90

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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.