Home / 205,457.20-308,179.32-121,790.68

Finding the Fourth Proportional to 205,457.20, 308,179.32 and 121,790.68

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Solution

The fourth proportional to 205,457.20, 308,179.32 and 121,790.68 is: 182,682.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,457.20 : 308,179.32 = 121,790.68 : x
  2. Step 2: Convert to fraction form
    205,457.20/308,179.32 = 121,790.68/x
  3. Step 3: Cross multiply
    205,457.20x = 308,179.32 × 121,790.68
  4. Step 4: Simplify right side
    205,457.20x = 37,533,368,944.74
  5. Step 5: Solve for x
    x = 37,533,368,944.74/205,457.20
  6. Step 6: Final answer
    x = 182,682.18

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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.