Home / 81,165.90-121,748.85-33,780.09

Finding the Fourth Proportional to 81,165.90, 121,748.85 and 33,780.09

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Solution

The fourth proportional to 81,165.90, 121,748.85 and 33,780.09 is: 50,670.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,165.90 : 121,748.85 = 33,780.09 : x
  2. Step 2: Convert to fraction form
    81,165.90/121,748.85 = 33,780.09/x
  3. Step 3: Cross multiply
    81,165.90x = 121,748.85 × 33,780.09
  4. Step 4: Simplify right side
    81,165.90x = 4,112,687,110.40
  5. Step 5: Solve for x
    x = 4,112,687,110.40/81,165.90
  6. Step 6: Final answer
    x = 50,670.14

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.