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Finding the Fourth Proportional to 81,206.67, 121,778.76 and 27,888.72

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Solution

The fourth proportional to 81,206.67, 121,778.76 and 27,888.72 is: 41,822.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,206.67 : 121,778.76 = 27,888.72 : x
  2. Step 2: Convert to fraction form
    81,206.67/121,778.76 = 27,888.72/x
  3. Step 3: Cross multiply
    81,206.67x = 121,778.76 × 27,888.72
  4. Step 4: Simplify right side
    81,206.67x = 3,396,253,739.59
  5. Step 5: Solve for x
    x = 3,396,253,739.59/81,206.67
  6. Step 6: Final answer
    x = 41,822.35

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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.