Home / 205,907.40-308,861.10-72,786.60

Finding the Fourth Proportional to 205,907.40, 308,861.10 and 72,786.60

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Solution

The fourth proportional to 205,907.40, 308,861.10 and 72,786.60 is: 109,179.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,907.40 : 308,861.10 = 72,786.60 : x
  2. Step 2: Convert to fraction form
    205,907.40/308,861.10 = 72,786.60/x
  3. Step 3: Cross multiply
    205,907.40x = 308,861.10 × 72,786.60
  4. Step 4: Simplify right side
    205,907.40x = 22,480,949,341.26
  5. Step 5: Solve for x
    x = 22,480,949,341.26/205,907.40
  6. Step 6: Final answer
    x = 109,179.90

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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.