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Finding the Fourth Proportional to 80,634.15, 110,981.34 and 71,011.11

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Solution

The fourth proportional to 80,634.15, 110,981.34 and 71,011.11 is: 97,736.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,634.15 : 110,981.34 = 71,011.11 : x
  2. Step 2: Convert to fraction form
    80,634.15/110,981.34 = 71,011.11/x
  3. Step 3: Cross multiply
    80,634.15x = 110,981.34 × 71,011.11
  4. Step 4: Simplify right side
    80,634.15x = 7,880,908,558.87
  5. Step 5: Solve for x
    x = 7,880,908,558.87/80,634.15
  6. Step 6: Final answer
    x = 97,736.61

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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.