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Finding the Fourth Proportional to 86,116, 129,225.84 and 36,868

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Solution

The fourth proportional to 86,116, 129,225.84 and 36,868 is: 55,324.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,116 : 129,225.84 = 36,868 : x
  2. Step 2: Convert to fraction form
    86,116/129,225.84 = 36,868/x
  3. Step 3: Cross multiply
    86,116x = 129,225.84 × 36,868
  4. Step 4: Simplify right side
    86,116x = 4,764,298,269.12
  5. Step 5: Solve for x
    x = 4,764,298,269.12/86,116
  6. Step 6: Final answer
    x = 55,324.19

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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.