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Finding the Fourth Proportional to 120,710.28, 166,580.18 and 66,995.28

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Solution

The fourth proportional to 120,710.28, 166,580.18 and 66,995.28 is: 92,453.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,710.28 : 166,580.18 = 66,995.28 : x
  2. Step 2: Convert to fraction form
    120,710.28/166,580.18 = 66,995.28/x
  3. Step 3: Cross multiply
    120,710.28x = 166,580.18 × 66,995.28
  4. Step 4: Simplify right side
    120,710.28x = 11,160,085,801.55
  5. Step 5: Solve for x
    x = 11,160,085,801.55/120,710.28
  6. Step 6: Final answer
    x = 92,453.48

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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.