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Finding the Fourth Proportional to 85,992.72, 128,973.96 and 22,813.44

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Solution

The fourth proportional to 85,992.72, 128,973.96 and 22,813.44 is: 34,216.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,992.72 : 128,973.96 = 22,813.44 : x
  2. Step 2: Convert to fraction form
    85,992.72/128,973.96 = 22,813.44/x
  3. Step 3: Cross multiply
    85,992.72x = 128,973.96 × 22,813.44
  4. Step 4: Simplify right side
    85,992.72x = 2,942,339,698.02
  5. Step 5: Solve for x
    x = 2,942,339,698.02/85,992.72
  6. Step 6: Final answer
    x = 34,216.15

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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.