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Finding the Fourth Proportional to 56,911.70, 85,371.71 and 21,851.37

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Solution

The fourth proportional to 56,911.70, 85,371.71 and 21,851.37 is: 32,778.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,911.70 : 85,371.71 = 21,851.37 : x
  2. Step 2: Convert to fraction form
    56,911.70/85,371.71 = 21,851.37/x
  3. Step 3: Cross multiply
    56,911.70x = 85,371.71 × 21,851.37
  4. Step 4: Simplify right side
    56,911.70x = 1,865,488,713.49
  5. Step 5: Solve for x
    x = 1,865,488,713.49/56,911.70
  6. Step 6: Final answer
    x = 32,778.65

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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.