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Finding the Fourth Proportional to 81,858.52, 122,787.78 and 58,530.52

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Solution

The fourth proportional to 81,858.52, 122,787.78 and 58,530.52 is: 87,795.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,858.52 : 122,787.78 = 58,530.52 : x
  2. Step 2: Convert to fraction form
    81,858.52/122,787.78 = 58,530.52/x
  3. Step 3: Cross multiply
    81,858.52x = 122,787.78 × 58,530.52
  4. Step 4: Simplify right side
    81,858.52x = 7,186,832,613.05
  5. Step 5: Solve for x
    x = 7,186,832,613.05/81,858.52
  6. Step 6: Final answer
    x = 87,795.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.