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Finding the Fourth Proportional to 258,262.96, 387,172.54 and 89,761.39

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Solution

The fourth proportional to 258,262.96, 387,172.54 and 89,761.39 is: 134,564.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,262.96 : 387,172.54 = 89,761.39 : x
  2. Step 2: Convert to fraction form
    258,262.96/387,172.54 = 89,761.39/x
  3. Step 3: Cross multiply
    258,262.96x = 387,172.54 × 89,761.39
  4. Step 4: Simplify right side
    258,262.96x = 34,753,145,360.23
  5. Step 5: Solve for x
    x = 34,753,145,360.23/258,262.96
  6. Step 6: Final answer
    x = 134,564.96

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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.