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Finding the Fourth Proportional to 208,235.58, 312,481.89 and 81,853.71

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Solution

The fourth proportional to 208,235.58, 312,481.89 and 81,853.71 is: 122,831.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,235.58 : 312,481.89 = 81,853.71 : x
  2. Step 2: Convert to fraction form
    208,235.58/312,481.89 = 81,853.71/x
  3. Step 3: Cross multiply
    208,235.58x = 312,481.89 × 81,853.71
  4. Step 4: Simplify right side
    208,235.58x = 25,577,802,004.31
  5. Step 5: Solve for x
    x = 25,577,802,004.31/208,235.58
  6. Step 6: Final answer
    x = 122,831.08

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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.