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Finding the Fourth Proportional to 101,530, 140,172.84 and 66,263.44

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Solution

The fourth proportional to 101,530, 140,172.84 and 66,263.44 is: 91,483.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,530 : 140,172.84 = 66,263.44 : x
  2. Step 2: Convert to fraction form
    101,530/140,172.84 = 66,263.44/x
  3. Step 3: Cross multiply
    101,530x = 140,172.84 × 66,263.44
  4. Step 4: Simplify right side
    101,530x = 9,288,334,572.97
  5. Step 5: Solve for x
    x = 9,288,334,572.97/101,530
  6. Step 6: Final answer
    x = 91,483.65

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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.