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Finding the Fourth Proportional to 81,055.94, 111,753.18 and 66,466.34

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Solution

The fourth proportional to 81,055.94, 111,753.18 and 66,466.34 is: 91,638.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,055.94 : 111,753.18 = 66,466.34 : x
  2. Step 2: Convert to fraction form
    81,055.94/111,753.18 = 66,466.34/x
  3. Step 3: Cross multiply
    81,055.94x = 111,753.18 × 66,466.34
  4. Step 4: Simplify right side
    81,055.94x = 7,427,824,857.96
  5. Step 5: Solve for x
    x = 7,427,824,857.96/81,055.94
  6. Step 6: Final answer
    x = 91,638.25

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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.