Home / 208,144.09-312,340.68-89,815.42

Finding the Fourth Proportional to 208,144.09, 312,340.68 and 89,815.42

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Solution

The fourth proportional to 208,144.09, 312,340.68 and 89,815.42 is: 134,776.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,144.09 : 312,340.68 = 89,815.42 : x
  2. Step 2: Convert to fraction form
    208,144.09/312,340.68 = 89,815.42/x
  3. Step 3: Cross multiply
    208,144.09x = 312,340.68 × 89,815.42
  4. Step 4: Simplify right side
    208,144.09x = 28,053,009,357.29
  5. Step 5: Solve for x
    x = 28,053,009,357.29/208,144.09
  6. Step 6: Final answer
    x = 134,776.87

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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.