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Finding the Fourth Proportional to 258,166.92, 387,009.62 and 87,269.73

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Solution

The fourth proportional to 258,166.92, 387,009.62 and 87,269.73 is: 130,823.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,166.92 : 387,009.62 = 87,269.73 : x
  2. Step 2: Convert to fraction form
    258,166.92/387,009.62 = 87,269.73/x
  3. Step 3: Cross multiply
    258,166.92x = 387,009.62 × 87,269.73
  4. Step 4: Simplify right side
    258,166.92x = 33,774,225,044.80
  5. Step 5: Solve for x
    x = 33,774,225,044.80/258,166.92
  6. Step 6: Final answer
    x = 130,823.21

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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.