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Finding the Fourth Proportional to 81,424.54, 112,365.90 and 49,593.47

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Solution

The fourth proportional to 81,424.54, 112,365.90 and 49,593.47 is: 68,439.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,424.54 : 112,365.90 = 49,593.47 : x
  2. Step 2: Convert to fraction form
    81,424.54/112,365.90 = 49,593.47/x
  3. Step 3: Cross multiply
    81,424.54x = 112,365.90 × 49,593.47
  4. Step 4: Simplify right side
    81,424.54x = 5,572,614,080.88
  5. Step 5: Solve for x
    x = 5,572,614,080.88/81,424.54
  6. Step 6: Final answer
    x = 68,439.00

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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.