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Finding the Fourth Proportional to 81,812.73, 112,907.49 and 49,987.71

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Solution

The fourth proportional to 81,812.73, 112,907.49 and 49,987.71 is: 68,986.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,812.73 : 112,907.49 = 49,987.71 : x
  2. Step 2: Convert to fraction form
    81,812.73/112,907.49 = 49,987.71/x
  3. Step 3: Cross multiply
    81,812.73x = 112,907.49 × 49,987.71
  4. Step 4: Simplify right side
    81,812.73x = 5,643,986,866.95
  5. Step 5: Solve for x
    x = 5,643,986,866.95/81,812.73
  6. Step 6: Final answer
    x = 68,986.66

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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.