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Finding the Fourth Proportional to 51,195.90, 76,791.16 and 19,621.08

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Solution

The fourth proportional to 51,195.90, 76,791.16 and 19,621.08 is: 29,430.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,195.90 : 76,791.16 = 19,621.08 : x
  2. Step 2: Convert to fraction form
    51,195.90/76,791.16 = 19,621.08/x
  3. Step 3: Cross multiply
    51,195.90x = 76,791.16 × 19,621.08
  4. Step 4: Simplify right side
    51,195.90x = 1,506,725,493.65
  5. Step 5: Solve for x
    x = 1,506,725,493.65/51,195.90
  6. Step 6: Final answer
    x = 29,430.59

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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.