Home / 258,621.29-388,110.33-90,143.03

Finding the Fourth Proportional to 258,621.29, 388,110.33 and 90,143.03

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Solution

The fourth proportional to 258,621.29, 388,110.33 and 90,143.03 is: 135,276.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,621.29 : 388,110.33 = 90,143.03 : x
  2. Step 2: Convert to fraction form
    258,621.29/388,110.33 = 90,143.03/x
  3. Step 3: Cross multiply
    258,621.29x = 388,110.33 × 90,143.03
  4. Step 4: Simplify right side
    258,621.29x = 34,985,441,120.50
  5. Step 5: Solve for x
    x = 34,985,441,120.50/258,621.29
  6. Step 6: Final answer
    x = 135,276.72

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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.