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Finding the Fourth Proportional to 56,751.50, 85,139.78 and 17,311.66

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Solution

The fourth proportional to 56,751.50, 85,139.78 and 17,311.66 is: 25,971.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,751.50 : 85,139.78 = 17,311.66 : x
  2. Step 2: Convert to fraction form
    56,751.50/85,139.78 = 17,311.66/x
  3. Step 3: Cross multiply
    56,751.50x = 85,139.78 × 17,311.66
  4. Step 4: Simplify right side
    56,751.50x = 1,473,910,624.43
  5. Step 5: Solve for x
    x = 1,473,910,624.43/56,751.50
  6. Step 6: Final answer
    x = 25,971.31

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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.