Home / 258,746.40-388,136.07-81,260.42

Finding the Fourth Proportional to 258,746.40, 388,136.07 and 81,260.42

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Solution

The fourth proportional to 258,746.40, 388,136.07 and 81,260.42 is: 121,895.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,746.40 : 388,136.07 = 81,260.42 : x
  2. Step 2: Convert to fraction form
    258,746.40/388,136.07 = 81,260.42/x
  3. Step 3: Cross multiply
    258,746.40x = 388,136.07 × 81,260.42
  4. Step 4: Simplify right side
    258,746.40x = 31,540,098,124.67
  5. Step 5: Solve for x
    x = 31,540,098,124.67/258,746.40
  6. Step 6: Final answer
    x = 121,895.79

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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.