Home / 51,389.20-77,089.72-19,791.90

Finding the Fourth Proportional to 51,389.20, 77,089.72 and 19,791.90

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Solution

The fourth proportional to 51,389.20, 77,089.72 and 19,791.90 is: 29,690.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,389.20 : 77,089.72 = 19,791.90 : x
  2. Step 2: Convert to fraction form
    51,389.20/77,089.72 = 19,791.90/x
  3. Step 3: Cross multiply
    51,389.20x = 77,089.72 × 19,791.90
  4. Step 4: Simplify right side
    51,389.20x = 1,525,752,029.27
  5. Step 5: Solve for x
    x = 1,525,752,029.27/51,389.20
  6. Step 6: Final answer
    x = 29,690.13

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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.