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Finding the Fourth Proportional to 81,169.82, 112,012.42 and 45,366.75

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Solution

The fourth proportional to 81,169.82, 112,012.42 and 45,366.75 is: 62,605.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,169.82 : 112,012.42 = 45,366.75 : x
  2. Step 2: Convert to fraction form
    81,169.82/112,012.42 = 45,366.75/x
  3. Step 3: Cross multiply
    81,169.82x = 112,012.42 × 45,366.75
  4. Step 4: Simplify right side
    81,169.82x = 5,081,639,519.41
  5. Step 5: Solve for x
    x = 5,081,639,519.41/81,169.82
  6. Step 6: Final answer
    x = 62,605.03

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1.5x scale

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.