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Finding the Fourth Proportional to 159,410.56, 219,986.56 and 87,789.96

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Solution

The fourth proportional to 159,410.56, 219,986.56 and 87,789.96 is: 121,150.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,410.56 : 219,986.56 = 87,789.96 : x
  2. Step 2: Convert to fraction form
    159,410.56/219,986.56 = 87,789.96/x
  3. Step 3: Cross multiply
    159,410.56x = 219,986.56 × 87,789.96
  4. Step 4: Simplify right side
    159,410.56x = 19,312,611,302.94
  5. Step 5: Solve for x
    x = 19,312,611,302.94/159,410.56
  6. Step 6: Final answer
    x = 121,150.14

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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.