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Finding the Fourth Proportional to 159,104.40, 219,559.86 and 86,505

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Solution

The fourth proportional to 159,104.40, 219,559.86 and 86,505 is: 119,374.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,104.40 : 219,559.86 = 86,505 : x
  2. Step 2: Convert to fraction form
    159,104.40/219,559.86 = 86,505/x
  3. Step 3: Cross multiply
    159,104.40x = 219,559.86 × 86,505
  4. Step 4: Simplify right side
    159,104.40x = 18,993,025,689.30
  5. Step 5: Solve for x
    x = 18,993,025,689.30/159,104.40
  6. Step 6: Final answer
    x = 119,374.61

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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.