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Finding the Fourth Proportional to 66,796.11, 100,223.38 and 57,920.30

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Solution

The fourth proportional to 66,796.11, 100,223.38 and 57,920.30 is: 86,905.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,796.11 : 100,223.38 = 57,920.30 : x
  2. Step 2: Convert to fraction form
    66,796.11/100,223.38 = 57,920.30/x
  3. Step 3: Cross multiply
    66,796.11x = 100,223.38 × 57,920.30
  4. Step 4: Simplify right side
    66,796.11x = 5,804,968,280.75
  5. Step 5: Solve for x
    x = 5,804,968,280.75/66,796.11
  6. Step 6: Final answer
    x = 86,905.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.