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Finding the Fourth Proportional to 86,309.01, 119,074.20 and 86,175.96

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Solution

The fourth proportional to 86,309.01, 119,074.20 and 86,175.96 is: 118,890.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,309.01 : 119,074.20 = 86,175.96 : x
  2. Step 2: Convert to fraction form
    86,309.01/119,074.20 = 86,175.96/x
  3. Step 3: Cross multiply
    86,309.01x = 119,074.20 × 86,175.96
  4. Step 4: Simplify right side
    86,309.01x = 10,261,333,049.70
  5. Step 5: Solve for x
    x = 10,261,333,049.70/86,309.01
  6. Step 6: Final answer
    x = 118,890.63

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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.