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Finding the Fourth Proportional to 85,961.14, 128,991.92 and 36,037.40

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Solution

The fourth proportional to 85,961.14, 128,991.92 and 36,037.40 is: 54,077.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,961.14 : 128,991.92 = 36,037.40 : x
  2. Step 2: Convert to fraction form
    85,961.14/128,991.92 = 36,037.40/x
  3. Step 3: Cross multiply
    85,961.14x = 128,991.92 × 36,037.40
  4. Step 4: Simplify right side
    85,961.14x = 4,648,532,592.66
  5. Step 5: Solve for x
    x = 4,648,532,592.66/85,961.14
  6. Step 6: Final answer
    x = 54,077.14

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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.