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Finding the Fourth Proportional to 80,502.61, 120,841.40 and 68,080.45

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Solution

The fourth proportional to 80,502.61, 120,841.40 and 68,080.45 is: 102,194.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,502.61 : 120,841.40 = 68,080.45 : x
  2. Step 2: Convert to fraction form
    80,502.61/120,841.40 = 68,080.45/x
  3. Step 3: Cross multiply
    80,502.61x = 120,841.40 × 68,080.45
  4. Step 4: Simplify right side
    80,502.61x = 8,226,936,890.63
  5. Step 5: Solve for x
    x = 8,226,936,890.63/80,502.61
  6. Step 6: Final answer
    x = 102,194.66

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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.