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Finding the Fourth Proportional to 258,551.58, 387,816.09 and 81,054.54

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Solution

The fourth proportional to 258,551.58, 387,816.09 and 81,054.54 is: 121,578.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,551.58 : 387,816.09 = 81,054.54 : x
  2. Step 2: Convert to fraction form
    258,551.58/387,816.09 = 81,054.54/x
  3. Step 3: Cross multiply
    258,551.58x = 387,816.09 × 81,054.54
  4. Step 4: Simplify right side
    258,551.58x = 31,434,254,779.55
  5. Step 5: Solve for x
    x = 31,434,254,779.55/258,551.58
  6. Step 6: Final answer
    x = 121,578.27

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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.