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Finding the Fourth Proportional to 151,323.84, 208,818.87 and 86,789.73

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Solution

The fourth proportional to 151,323.84, 208,818.87 and 86,789.73 is: 119,765.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,323.84 : 208,818.87 = 86,789.73 : x
  2. Step 2: Convert to fraction form
    151,323.84/208,818.87 = 86,789.73/x
  3. Step 3: Cross multiply
    151,323.84x = 208,818.87 × 86,789.73
  4. Step 4: Simplify right side
    151,323.84x = 18,123,333,346.21
  5. Step 5: Solve for x
    x = 18,123,333,346.21/151,323.84
  6. Step 6: Final answer
    x = 119,765.22

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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.