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Finding the Fourth Proportional to 56,751.33, 85,137.93 and 19,309.89

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Solution

The fourth proportional to 56,751.33, 85,137.93 and 19,309.89 is: 28,968.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,751.33 : 85,137.93 = 19,309.89 : x
  2. Step 2: Convert to fraction form
    56,751.33/85,137.93 = 19,309.89/x
  3. Step 3: Cross multiply
    56,751.33x = 85,137.93 × 19,309.89
  4. Step 4: Simplify right side
    56,751.33x = 1,644,004,063.13
  5. Step 5: Solve for x
    x = 1,644,004,063.13/56,751.33
  6. Step 6: Final answer
    x = 28,968.56

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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.