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Finding the Fourth Proportional to 258,564.54, 387,846.84 and 81,087.06

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Solution

The fourth proportional to 258,564.54, 387,846.84 and 81,087.06 is: 121,630.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,564.54 : 387,846.84 = 81,087.06 : x
  2. Step 2: Convert to fraction form
    258,564.54/387,846.84 = 81,087.06/x
  3. Step 3: Cross multiply
    258,564.54x = 387,846.84 × 81,087.06
  4. Step 4: Simplify right side
    258,564.54x = 31,449,359,985.89
  5. Step 5: Solve for x
    x = 31,449,359,985.89/258,564.54
  6. Step 6: Final answer
    x = 121,630.60

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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.