Home / 258,639.93-387,996.30-90,136.04

Finding the Fourth Proportional to 258,639.93, 387,996.30 and 90,136.04

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Solution

The fourth proportional to 258,639.93, 387,996.30 and 90,136.04 is: 135,216.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,639.93 : 387,996.30 = 90,136.04 : x
  2. Step 2: Convert to fraction form
    258,639.93/387,996.30 = 90,136.04/x
  3. Step 3: Cross multiply
    258,639.93x = 387,996.30 × 90,136.04
  4. Step 4: Simplify right side
    258,639.93x = 34,972,448,076.67
  5. Step 5: Solve for x
    x = 34,972,448,076.67/258,639.93
  6. Step 6: Final answer
    x = 135,216.74

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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.