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Finding the Fourth Proportional to 81,329.99, 112,235.37 and 45,520

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Solution

The fourth proportional to 81,329.99, 112,235.37 and 45,520 is: 62,817.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,329.99 : 112,235.37 = 45,520 : x
  2. Step 2: Convert to fraction form
    81,329.99/112,235.37 = 45,520/x
  3. Step 3: Cross multiply
    81,329.99x = 112,235.37 × 45,520
  4. Step 4: Simplify right side
    81,329.99x = 5,108,954,042.40
  5. Step 5: Solve for x
    x = 5,108,954,042.40/81,329.99
  6. Step 6: Final answer
    x = 62,817.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.