Home / 205,785.87-308,690.75-79,426.81

Finding the Fourth Proportional to 205,785.87, 308,690.75 and 79,426.81

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Solution

The fourth proportional to 205,785.87, 308,690.75 and 79,426.81 is: 119,144.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,785.87 : 308,690.75 = 79,426.81 : x
  2. Step 2: Convert to fraction form
    205,785.87/308,690.75 = 79,426.81/x
  3. Step 3: Cross multiply
    205,785.87x = 308,690.75 × 79,426.81
  4. Step 4: Simplify right side
    205,785.87x = 24,518,321,549.01
  5. Step 5: Solve for x
    x = 24,518,321,549.01/205,785.87
  6. Step 6: Final answer
    x = 119,144.83

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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.