Home / 81,669.66-112,716.36-49,857

Finding the Fourth Proportional to 81,669.66, 112,716.36 and 49,857

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Solution

The fourth proportional to 81,669.66, 112,716.36 and 49,857 is: 68,810.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,669.66 : 112,716.36 = 49,857 : x
  2. Step 2: Convert to fraction form
    81,669.66/112,716.36 = 49,857/x
  3. Step 3: Cross multiply
    81,669.66x = 112,716.36 × 49,857
  4. Step 4: Simplify right side
    81,669.66x = 5,619,699,560.52
  5. Step 5: Solve for x
    x = 5,619,699,560.52/81,669.66
  6. Step 6: Final answer
    x = 68,810.13

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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.