Home / 205,986.81-308,730.69-87,409.05

Finding the Fourth Proportional to 205,986.81, 308,730.69 and 87,409.05

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Solution

The fourth proportional to 205,986.81, 308,730.69 and 87,409.05 is: 131,007.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,986.81 : 308,730.69 = 87,409.05 : x
  2. Step 2: Convert to fraction form
    205,986.81/308,730.69 = 87,409.05/x
  3. Step 3: Cross multiply
    205,986.81x = 308,730.69 × 87,409.05
  4. Step 4: Simplify right side
    205,986.81x = 26,985,856,318.74
  5. Step 5: Solve for x
    x = 26,985,856,318.74/205,986.81
  6. Step 6: Final answer
    x = 131,007.69

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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.