Home / 85,816.38-128,635.20-28,848

Finding the Fourth Proportional to 85,816.38, 128,635.20 and 28,848

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Solution

The fourth proportional to 85,816.38, 128,635.20 and 28,848 is: 43,241.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,816.38 : 128,635.20 = 28,848 : x
  2. Step 2: Convert to fraction form
    85,816.38/128,635.20 = 28,848/x
  3. Step 3: Cross multiply
    85,816.38x = 128,635.20 × 28,848
  4. Step 4: Simplify right side
    85,816.38x = 3,710,868,249.60
  5. Step 5: Solve for x
    x = 3,710,868,249.60/85,816.38
  6. Step 6: Final answer
    x = 43,241.96

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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.