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Finding the Fourth Proportional to 159,619.52, 220,268.31 and 87,020.84

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Solution

The fourth proportional to 159,619.52, 220,268.31 and 87,020.84 is: 120,085.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,619.52 : 220,268.31 = 87,020.84 : x
  2. Step 2: Convert to fraction form
    159,619.52/220,268.31 = 87,020.84/x
  3. Step 3: Cross multiply
    159,619.52x = 220,268.31 × 87,020.84
  4. Step 4: Simplify right side
    159,619.52x = 19,167,933,585.92
  5. Step 5: Solve for x
    x = 19,167,933,585.92/159,619.52
  6. Step 6: Final answer
    x = 120,085.15

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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.