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Finding the Fourth Proportional to 61,320.91, 91,992.77 and 21,338.23

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Solution

The fourth proportional to 61,320.91, 91,992.77 and 21,338.23 is: 32,011.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,320.91 : 91,992.77 = 21,338.23 : x
  2. Step 2: Convert to fraction form
    61,320.91/91,992.77 = 21,338.23/x
  3. Step 3: Cross multiply
    61,320.91x = 91,992.77 × 21,338.23
  4. Step 4: Simplify right side
    61,320.91x = 1,962,962,884.60
  5. Step 5: Solve for x
    x = 1,962,962,884.60/61,320.91
  6. Step 6: Final answer
    x = 32,011.31

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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.