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Finding the Fourth Proportional to 258,958.80, 387,855 and 132,637.68

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Solution

The fourth proportional to 258,958.80, 387,855 and 132,637.68 is: 198,657.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,958.80 : 387,855 = 132,637.68 : x
  2. Step 2: Convert to fraction form
    258,958.80/387,855 = 132,637.68/x
  3. Step 3: Cross multiply
    258,958.80x = 387,855 × 132,637.68
  4. Step 4: Simplify right side
    258,958.80x = 51,444,187,376.40
  5. Step 5: Solve for x
    x = 51,444,187,376.40/258,958.80
  6. Step 6: Final answer
    x = 198,657.81

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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.