Home / 258,909.90-388,403.13-132,621.59

Finding the Fourth Proportional to 258,909.90, 388,403.13 and 132,621.59

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Solution

The fourth proportional to 258,909.90, 388,403.13 and 132,621.59 is: 198,951.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,909.90 : 388,403.13 = 132,621.59 : x
  2. Step 2: Convert to fraction form
    258,909.90/388,403.13 = 132,621.59/x
  3. Step 3: Cross multiply
    258,909.90x = 388,403.13 × 132,621.59
  4. Step 4: Simplify right side
    258,909.90x = 51,510,638,719.56
  5. Step 5: Solve for x
    x = 51,510,638,719.56/258,909.90
  6. Step 6: Final answer
    x = 198,951.99

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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.