Home / 85,839.20-128,715.60-50,789.60

Finding the Fourth Proportional to 85,839.20, 128,715.60 and 50,789.60

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Solution

The fourth proportional to 85,839.20, 128,715.60 and 50,789.60 is: 76,158.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,839.20 : 128,715.60 = 50,789.60 : x
  2. Step 2: Convert to fraction form
    85,839.20/128,715.60 = 50,789.60/x
  3. Step 3: Cross multiply
    85,839.20x = 128,715.60 × 50,789.60
  4. Step 4: Simplify right side
    85,839.20x = 6,537,413,837.76
  5. Step 5: Solve for x
    x = 6,537,413,837.76/85,839.20
  6. Step 6: Final answer
    x = 76,158.84

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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.