Home / 75,789.12-113,683.60-20,385.12

Finding the Fourth Proportional to 75,789.12, 113,683.60 and 20,385.12

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Solution

The fourth proportional to 75,789.12, 113,683.60 and 20,385.12 is: 30,577.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,789.12 : 113,683.60 = 20,385.12 : x
  2. Step 2: Convert to fraction form
    75,789.12/113,683.60 = 20,385.12/x
  3. Step 3: Cross multiply
    75,789.12x = 113,683.60 × 20,385.12
  4. Step 4: Simplify right side
    75,789.12x = 2,317,453,828.03
  5. Step 5: Solve for x
    x = 2,317,453,828.03/75,789.12
  6. Step 6: Final answer
    x = 30,577.66

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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.