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Finding the Fourth Proportional to 258,416.96, 387,594.59 and 68,891.54

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Solution

The fourth proportional to 258,416.96, 387,594.59 and 68,891.54 is: 103,329.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,416.96 : 387,594.59 = 68,891.54 : x
  2. Step 2: Convert to fraction form
    258,416.96/387,594.59 = 68,891.54/x
  3. Step 3: Cross multiply
    258,416.96x = 387,594.59 × 68,891.54
  4. Step 4: Simplify right side
    258,416.96x = 26,701,985,918.34
  5. Step 5: Solve for x
    x = 26,701,985,918.34/258,416.96
  6. Step 6: Final answer
    x = 103,329.08

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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.