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Finding the Fourth Proportional to 136,291.96, 188,082.92 and 75,861.31

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Solution

The fourth proportional to 136,291.96, 188,082.92 and 75,861.31 is: 104,688.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,291.96 : 188,082.92 = 75,861.31 : x
  2. Step 2: Convert to fraction form
    136,291.96/188,082.92 = 75,861.31/x
  3. Step 3: Cross multiply
    136,291.96x = 188,082.92 × 75,861.31
  4. Step 4: Simplify right side
    136,291.96x = 14,268,216,699.83
  5. Step 5: Solve for x
    x = 14,268,216,699.83/136,291.96
  6. Step 6: Final answer
    x = 104,688.62

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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.