Home / 205,987.20-309,163.05-121,641.90

Finding the Fourth Proportional to 205,987.20, 309,163.05 and 121,641.90

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Solution

The fourth proportional to 205,987.20, 309,163.05 and 121,641.90 is: 182,570.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,987.20 : 309,163.05 = 121,641.90 : x
  2. Step 2: Convert to fraction form
    205,987.20/309,163.05 = 121,641.90/x
  3. Step 3: Cross multiply
    205,987.20x = 309,163.05 × 121,641.90
  4. Step 4: Simplify right side
    205,987.20x = 37,607,180,811.80
  5. Step 5: Solve for x
    x = 37,607,180,811.80/205,987.20
  6. Step 6: Final answer
    x = 182,570.47

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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.