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Finding the Fourth Proportional to 81,873.78, 112,985.79 and 45,574.44

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Solution

The fourth proportional to 81,873.78, 112,985.79 and 45,574.44 is: 62,892.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,873.78 : 112,985.79 = 45,574.44 : x
  2. Step 2: Convert to fraction form
    81,873.78/112,985.79 = 45,574.44/x
  3. Step 3: Cross multiply
    81,873.78x = 112,985.79 × 45,574.44
  4. Step 4: Simplify right side
    81,873.78x = 5,149,264,107.21
  5. Step 5: Solve for x
    x = 5,149,264,107.21/81,873.78
  6. Step 6: Final answer
    x = 62,892.71

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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.