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Finding the Fourth Proportional to 159,390.73, 219,959.19 and 87,770.58

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Solution

The fourth proportional to 159,390.73, 219,959.19 and 87,770.58 is: 121,123.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,390.73 : 219,959.19 = 87,770.58 : x
  2. Step 2: Convert to fraction form
    159,390.73/219,959.19 = 87,770.58/x
  3. Step 3: Cross multiply
    159,390.73x = 219,959.19 × 87,770.58
  4. Step 4: Simplify right side
    159,390.73x = 19,305,945,682.63
  5. Step 5: Solve for x
    x = 19,305,945,682.63/159,390.73
  6. Step 6: Final answer
    x = 121,123.39

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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.