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Finding the Fourth Proportional to 81,212.52, 112,074.08 and 45,404.49

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Solution

The fourth proportional to 81,212.52, 112,074.08 and 45,404.49 is: 62,658.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,212.52 : 112,074.08 = 45,404.49 : x
  2. Step 2: Convert to fraction form
    81,212.52/112,074.08 = 45,404.49/x
  3. Step 3: Cross multiply
    81,212.52x = 112,074.08 × 45,404.49
  4. Step 4: Simplify right side
    81,212.52x = 5,088,666,217.60
  5. Step 5: Solve for x
    x = 5,088,666,217.60/81,212.52
  6. Step 6: Final answer
    x = 62,658.64

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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.