Home / 120,143.25-165,791.21-66,425.13

Finding the Fourth Proportional to 120,143.25, 165,791.21 and 66,425.13

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Solution

The fourth proportional to 120,143.25, 165,791.21 and 66,425.13 is: 91,663.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,143.25 : 165,791.21 = 66,425.13 : x
  2. Step 2: Convert to fraction form
    120,143.25/165,791.21 = 66,425.13/x
  3. Step 3: Cross multiply
    120,143.25x = 165,791.21 × 66,425.13
  4. Step 4: Simplify right side
    120,143.25x = 11,012,702,344.98
  5. Step 5: Solve for x
    x = 11,012,702,344.98/120,143.25
  6. Step 6: Final answer
    x = 91,663.10

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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.