Home / 208,120.45-312,054.26-81,609.13

Finding the Fourth Proportional to 208,120.45, 312,054.26 and 81,609.13

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Solution

The fourth proportional to 208,120.45, 312,054.26 and 81,609.13 is: 122,364.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,120.45 : 312,054.26 = 81,609.13 : x
  2. Step 2: Convert to fraction form
    208,120.45/312,054.26 = 81,609.13/x
  3. Step 3: Cross multiply
    208,120.45x = 312,054.26 × 81,609.13
  4. Step 4: Simplify right side
    208,120.45x = 25,466,476,882.94
  5. Step 5: Solve for x
    x = 25,466,476,882.94/208,120.45
  6. Step 6: Final answer
    x = 122,364.13

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1.5x scale

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.