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Finding the Fourth Proportional to 81,053.94, 111,750.42 and 66,464.34

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Solution

The fourth proportional to 81,053.94, 111,750.42 and 66,464.34 is: 91,635.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,053.94 : 111,750.42 = 66,464.34 : x
  2. Step 2: Convert to fraction form
    81,053.94/111,750.42 = 66,464.34/x
  3. Step 3: Cross multiply
    81,053.94x = 111,750.42 × 66,464.34
  4. Step 4: Simplify right side
    81,053.94x = 7,427,417,910.02
  5. Step 5: Solve for x
    x = 7,427,417,910.02/81,053.94
  6. Step 6: Final answer
    x = 91,635.49

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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.