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Finding the Fourth Proportional to 159,380.63, 219,945.27 and 87,760.47

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Solution

The fourth proportional to 159,380.63, 219,945.27 and 87,760.47 is: 121,109.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,380.63 : 219,945.27 = 87,760.47 : x
  2. Step 2: Convert to fraction form
    159,380.63/219,945.27 = 87,760.47/x
  3. Step 3: Cross multiply
    159,380.63x = 219,945.27 × 87,760.47
  4. Step 4: Simplify right side
    159,380.63x = 19,302,500,269.48
  5. Step 5: Solve for x
    x = 19,302,500,269.48/159,380.63
  6. Step 6: Final answer
    x = 121,109.45

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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.