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Finding the Fourth Proportional to 258,554.58, 387,820.59 and 81,057.54

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Solution

The fourth proportional to 258,554.58, 387,820.59 and 81,057.54 is: 121,582.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,554.58 : 387,820.59 = 81,057.54 : x
  2. Step 2: Convert to fraction form
    258,554.58/387,820.59 = 81,057.54/x
  3. Step 3: Cross multiply
    258,554.58x = 387,820.59 × 81,057.54
  4. Step 4: Simplify right side
    258,554.58x = 31,435,782,986.75
  5. Step 5: Solve for x
    x = 31,435,782,986.75/258,554.58
  6. Step 6: Final answer
    x = 121,582.77

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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.