Home / 81,279.72-121,936.50-28,726.92

Finding the Fourth Proportional to 81,279.72, 121,936.50 and 28,726.92

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Solution

The fourth proportional to 81,279.72, 121,936.50 and 28,726.92 is: 43,096.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,279.72 : 121,936.50 = 28,726.92 : x
  2. Step 2: Convert to fraction form
    81,279.72/121,936.50 = 28,726.92/x
  3. Step 3: Cross multiply
    81,279.72x = 121,936.50 × 28,726.92
  4. Step 4: Simplify right side
    81,279.72x = 3,502,860,080.58
  5. Step 5: Solve for x
    x = 3,502,860,080.58/81,279.72
  6. Step 6: Final answer
    x = 43,096.36

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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.