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Finding the Fourth Proportional to 258,267.88, 387,518.60 and 131,842.88

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Solution

The fourth proportional to 258,267.88, 387,518.60 and 131,842.88 is: 197,823.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,267.88 : 387,518.60 = 131,842.88 : x
  2. Step 2: Convert to fraction form
    258,267.88/387,518.60 = 131,842.88/x
  3. Step 3: Cross multiply
    258,267.88x = 387,518.60 × 131,842.88
  4. Step 4: Simplify right side
    258,267.88x = 51,091,568,277.57
  5. Step 5: Solve for x
    x = 51,091,568,277.57/258,267.88
  6. Step 6: Final answer
    x = 197,823.93

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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.