Home / 81,291.74-121,976.48-28,725.98

Finding the Fourth Proportional to 81,291.74, 121,976.48 and 28,725.98

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Solution

The fourth proportional to 81,291.74, 121,976.48 and 28,725.98 is: 43,102.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,291.74 : 121,976.48 = 28,725.98 : x
  2. Step 2: Convert to fraction form
    81,291.74/121,976.48 = 28,725.98/x
  3. Step 3: Cross multiply
    81,291.74x = 121,976.48 × 28,725.98
  4. Step 4: Simplify right side
    81,291.74x = 3,503,893,386.88
  5. Step 5: Solve for x
    x = 3,503,893,386.88/81,291.74
  6. Step 6: Final answer
    x = 43,102.70

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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.