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Finding the Fourth Proportional to 101,422.77, 139,992.48 and 66,992.64

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Solution

The fourth proportional to 101,422.77, 139,992.48 and 66,992.64 is: 92,469.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,422.77 : 139,992.48 = 66,992.64 : x
  2. Step 2: Convert to fraction form
    101,422.77/139,992.48 = 66,992.64/x
  3. Step 3: Cross multiply
    101,422.77x = 139,992.48 × 66,992.64
  4. Step 4: Simplify right side
    101,422.77x = 9,378,465,815.35
  5. Step 5: Solve for x
    x = 9,378,465,815.35/101,422.77
  6. Step 6: Final answer
    x = 92,469.04

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1.5x scale

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.