Home / 205,781.42-283,965-115,121.72

Finding the Fourth Proportional to 205,781.42, 283,965 and 115,121.72

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Solution

The fourth proportional to 205,781.42, 283,965 and 115,121.72 is: 158,860.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,781.42 : 283,965 = 115,121.72 : x
  2. Step 2: Convert to fraction form
    205,781.42/283,965 = 115,121.72/x
  3. Step 3: Cross multiply
    205,781.42x = 283,965 × 115,121.72
  4. Step 4: Simplify right side
    205,781.42x = 32,690,539,219.80
  5. Step 5: Solve for x
    x = 32,690,539,219.80/205,781.42
  6. Step 6: Final answer
    x = 158,860.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.