Home / 85,765.20-128,538.45-41,296.20

Finding the Fourth Proportional to 85,765.20, 128,538.45 and 41,296.20

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Solution

The fourth proportional to 85,765.20, 128,538.45 and 41,296.20 is: 61,891.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,765.20 : 128,538.45 = 41,296.20 : x
  2. Step 2: Convert to fraction form
    85,765.20/128,538.45 = 41,296.20/x
  3. Step 3: Cross multiply
    85,765.20x = 128,538.45 × 41,296.20
  4. Step 4: Simplify right side
    85,765.20x = 5,308,149,538.89
  5. Step 5: Solve for x
    x = 5,308,149,538.89/85,765.20
  6. Step 6: Final answer
    x = 61,891.65

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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.