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Finding the Fourth Proportional to 80,216.40, 120,502.80 and 67,094.40

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Solution

The fourth proportional to 80,216.40, 120,502.80 and 67,094.40 is: 100,790.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,216.40 : 120,502.80 = 67,094.40 : x
  2. Step 2: Convert to fraction form
    80,216.40/120,502.80 = 67,094.40/x
  3. Step 3: Cross multiply
    80,216.40x = 120,502.80 × 67,094.40
  4. Step 4: Simplify right side
    80,216.40x = 8,085,063,064.32
  5. Step 5: Solve for x
    x = 8,085,063,064.32/80,216.40
  6. Step 6: Final answer
    x = 100,790.65

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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.