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Finding the Fourth Proportional to 120,028.86, 165,631.50 and 66,313.44

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Solution

The fourth proportional to 120,028.86, 165,631.50 and 66,313.44 is: 91,507.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,028.86 : 165,631.50 = 66,313.44 : x
  2. Step 2: Convert to fraction form
    120,028.86/165,631.50 = 66,313.44/x
  3. Step 3: Cross multiply
    120,028.86x = 165,631.50 × 66,313.44
  4. Step 4: Simplify right side
    120,028.86x = 10,983,594,537.36
  5. Step 5: Solve for x
    x = 10,983,594,537.36/120,028.86
  6. Step 6: Final answer
    x = 91,507.95

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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.