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Finding the Fourth Proportional to 81,221.84, 112,081.52 and 44,921.12

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Solution

The fourth proportional to 81,221.84, 112,081.52 and 44,921.12 is: 61,988.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,221.84 : 112,081.52 = 44,921.12 : x
  2. Step 2: Convert to fraction form
    81,221.84/112,081.52 = 44,921.12/x
  3. Step 3: Cross multiply
    81,221.84x = 112,081.52 × 44,921.12
  4. Step 4: Simplify right side
    81,221.84x = 5,034,826,961.60
  5. Step 5: Solve for x
    x = 5,034,826,961.60/81,221.84
  6. Step 6: Final answer
    x = 61,988.59

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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.