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Finding the Fourth Proportional to 80,319.93, 110,789.55 and 63,297.78

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Solution

The fourth proportional to 80,319.93, 110,789.55 and 63,297.78 is: 87,309.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,319.93 : 110,789.55 = 63,297.78 : x
  2. Step 2: Convert to fraction form
    80,319.93/110,789.55 = 63,297.78/x
  3. Step 3: Cross multiply
    80,319.93x = 110,789.55 × 63,297.78
  4. Step 4: Simplify right side
    80,319.93x = 7,012,732,562.20
  5. Step 5: Solve for x
    x = 7,012,732,562.20/80,319.93
  6. Step 6: Final answer
    x = 87,309.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.