Home / 208,076.43-287,054.34-121,991.86

Finding the Fourth Proportional to 208,076.43, 287,054.34 and 121,991.86

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Solution

The fourth proportional to 208,076.43, 287,054.34 and 121,991.86 is: 168,295.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,076.43 : 287,054.34 = 121,991.86 : x
  2. Step 2: Convert to fraction form
    208,076.43/287,054.34 = 121,991.86/x
  3. Step 3: Cross multiply
    208,076.43x = 287,054.34 × 121,991.86
  4. Step 4: Simplify right side
    208,076.43x = 35,018,292,857.67
  5. Step 5: Solve for x
    x = 35,018,292,857.67/208,076.43
  6. Step 6: Final answer
    x = 168,295.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.