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Finding the Fourth Proportional to 81,067.72, 121,596.99 and 21,898.93

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Solution

The fourth proportional to 81,067.72, 121,596.99 and 21,898.93 is: 32,847.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,067.72 : 121,596.99 = 21,898.93 : x
  2. Step 2: Convert to fraction form
    81,067.72/121,596.99 = 21,898.93/x
  3. Step 3: Cross multiply
    81,067.72x = 121,596.99 × 21,898.93
  4. Step 4: Simplify right side
    81,067.72x = 2,662,843,972.22
  5. Step 5: Solve for x
    x = 2,662,843,972.22/81,067.72
  6. Step 6: Final answer
    x = 32,847.16

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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.