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Finding the Fourth Proportional to 81,129.80, 111,953.52 and 44,829.68

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Solution

The fourth proportional to 81,129.80, 111,953.52 and 44,829.68 is: 61,861.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,129.80 : 111,953.52 = 44,829.68 : x
  2. Step 2: Convert to fraction form
    81,129.80/111,953.52 = 44,829.68/x
  3. Step 3: Cross multiply
    81,129.80x = 111,953.52 × 44,829.68
  4. Step 4: Simplify right side
    81,129.80x = 5,018,840,476.47
  5. Step 5: Solve for x
    x = 5,018,840,476.47/81,129.80
  6. Step 6: Final answer
    x = 61,861.86

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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.