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Finding the Fourth Proportional to 85,940.70, 128,801.70 and 41,471.70

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Solution

The fourth proportional to 85,940.70, 128,801.70 and 41,471.70 is: 62,154.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,940.70 : 128,801.70 = 41,471.70 : x
  2. Step 2: Convert to fraction form
    85,940.70/128,801.70 = 41,471.70/x
  3. Step 3: Cross multiply
    85,940.70x = 128,801.70 × 41,471.70
  4. Step 4: Simplify right side
    85,940.70x = 5,341,625,461.89
  5. Step 5: Solve for x
    x = 5,341,625,461.89/85,940.70
  6. Step 6: Final answer
    x = 62,154.78

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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.