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Finding the Fourth Proportional to 81,056, 111,855.12 and 45,245

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Solution

The fourth proportional to 81,056, 111,855.12 and 45,245 is: 62,436.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,056 : 111,855.12 = 45,245 : x
  2. Step 2: Convert to fraction form
    81,056/111,855.12 = 45,245/x
  3. Step 3: Cross multiply
    81,056x = 111,855.12 × 45,245
  4. Step 4: Simplify right side
    81,056x = 5,060,884,904.40
  5. Step 5: Solve for x
    x = 5,060,884,904.40/81,056
  6. Step 6: Final answer
    x = 62,436.89

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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.