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Finding the Fourth Proportional to 85,581.70, 128,263.20 and 41,112.70

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Solution

The fourth proportional to 85,581.70, 128,263.20 and 41,112.70 is: 61,616.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,581.70 : 128,263.20 = 41,112.70 : x
  2. Step 2: Convert to fraction form
    85,581.70/128,263.20 = 41,112.70/x
  3. Step 3: Cross multiply
    85,581.70x = 128,263.20 × 41,112.70
  4. Step 4: Simplify right side
    85,581.70x = 5,273,246,462.64
  5. Step 5: Solve for x
    x = 5,273,246,462.64/85,581.70
  6. Step 6: Final answer
    x = 61,616.52

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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.