Home / 205,907.20-308,860.80-72,786.40

Finding the Fourth Proportional to 205,907.20, 308,860.80 and 72,786.40

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Solution

The fourth proportional to 205,907.20, 308,860.80 and 72,786.40 is: 109,179.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,907.20 : 308,860.80 = 72,786.40 : x
  2. Step 2: Convert to fraction form
    205,907.20/308,860.80 = 72,786.40/x
  3. Step 3: Cross multiply
    205,907.20x = 308,860.80 × 72,786.40
  4. Step 4: Simplify right side
    205,907.20x = 22,480,865,733.12
  5. Step 5: Solve for x
    x = 22,480,865,733.12/205,907.20
  6. Step 6: Final answer
    x = 109,179.60

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1.5x scale

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.