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Finding the Fourth Proportional to 56,805.50, 85,219.20 and 25,640.78

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Solution

The fourth proportional to 56,805.50, 85,219.20 and 25,640.78 is: 38,466.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,805.50 : 85,219.20 = 25,640.78 : x
  2. Step 2: Convert to fraction form
    56,805.50/85,219.20 = 25,640.78/x
  3. Step 3: Cross multiply
    56,805.50x = 85,219.20 × 25,640.78
  4. Step 4: Simplify right side
    56,805.50x = 2,185,086,758.98
  5. Step 5: Solve for x
    x = 2,185,086,758.98/56,805.50
  6. Step 6: Final answer
    x = 38,466.11

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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.