Home / 120,031.30-165,629.08-66,313.11

Finding the Fourth Proportional to 120,031.30, 165,629.08 and 66,313.11

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Solution

The fourth proportional to 120,031.30, 165,629.08 and 66,313.11 is: 91,504.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,031.30 : 165,629.08 = 66,313.11 : x
  2. Step 2: Convert to fraction form
    120,031.30/165,629.08 = 66,313.11/x
  3. Step 3: Cross multiply
    120,031.30x = 165,629.08 × 66,313.11
  4. Step 4: Simplify right side
    120,031.30x = 10,983,379,918.73
  5. Step 5: Solve for x
    x = 10,983,379,918.73/120,031.30
  6. Step 6: Final answer
    x = 91,504.30

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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.