Home / 258,520.10-387,788.79-71,515.94

Finding the Fourth Proportional to 258,520.10, 387,788.79 and 71,515.94

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Solution

The fourth proportional to 258,520.10, 387,788.79 and 71,515.94 is: 107,276.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,520.10 : 387,788.79 = 71,515.94 : x
  2. Step 2: Convert to fraction form
    258,520.10/387,788.79 = 71,515.94/x
  3. Step 3: Cross multiply
    258,520.10x = 387,788.79 × 71,515.94
  4. Step 4: Simplify right side
    258,520.10x = 27,733,079,838.31
  5. Step 5: Solve for x
    x = 27,733,079,838.31/258,520.10
  6. Step 6: Final answer
    x = 107,276.30

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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.