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Finding the Fourth Proportional to 81,298.80, 121,917.89 and 27,975.89

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Solution

The fourth proportional to 81,298.80, 121,917.89 and 27,975.89 is: 41,953.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,298.80 : 121,917.89 = 27,975.89 : x
  2. Step 2: Convert to fraction form
    81,298.80/121,917.89 = 27,975.89/x
  3. Step 3: Cross multiply
    81,298.80x = 121,917.89 × 27,975.89
  4. Step 4: Simplify right side
    81,298.80x = 3,410,761,854.41
  5. Step 5: Solve for x
    x = 3,410,761,854.41/81,298.80
  6. Step 6: Final answer
    x = 41,953.41

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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.