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Finding the Fourth Proportional to 258,334.79, 387,509.52 and 71,346.29

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Solution

The fourth proportional to 258,334.79, 387,509.52 and 71,346.29 is: 107,021.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,334.79 : 387,509.52 = 71,346.29 : x
  2. Step 2: Convert to fraction form
    258,334.79/387,509.52 = 71,346.29/x
  3. Step 3: Cross multiply
    258,334.79x = 387,509.52 × 71,346.29
  4. Step 4: Simplify right side
    258,334.79x = 27,647,366,591.68
  5. Step 5: Solve for x
    x = 27,647,366,591.68/258,334.79
  6. Step 6: Final answer
    x = 107,021.46

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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.