Home / 81,886.78-113,003.67-47,918.62

Finding the Fourth Proportional to 81,886.78, 113,003.67 and 47,918.62

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Solution

The fourth proportional to 81,886.78, 113,003.67 and 47,918.62 is: 66,127.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,886.78 : 113,003.67 = 47,918.62 : x
  2. Step 2: Convert to fraction form
    81,886.78/113,003.67 = 47,918.62/x
  3. Step 3: Cross multiply
    81,886.78x = 113,003.67 × 47,918.62
  4. Step 4: Simplify right side
    81,886.78x = 5,414,979,921.34
  5. Step 5: Solve for x
    x = 5,414,979,921.34/81,886.78
  6. Step 6: Final answer
    x = 66,127.65

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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.