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Finding the Fourth Proportional to 258,652.25, 387,994.78 and 81,166.27

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Solution

The fourth proportional to 258,652.25, 387,994.78 and 81,166.27 is: 121,754.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,652.25 : 387,994.78 = 81,166.27 : x
  2. Step 2: Convert to fraction form
    258,652.25/387,994.78 = 81,166.27/x
  3. Step 3: Cross multiply
    258,652.25x = 387,994.78 × 81,166.27
  4. Step 4: Simplify right side
    258,652.25x = 31,492,089,072.07
  5. Step 5: Solve for x
    x = 31,492,089,072.07/258,652.25
  6. Step 6: Final answer
    x = 121,754.55

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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.