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Finding the Fourth Proportional to 112,980.85, 155,927.41 and 65,234.09

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Solution

The fourth proportional to 112,980.85, 155,927.41 and 65,234.09 is: 90,031.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,980.85 : 155,927.41 = 65,234.09 : x
  2. Step 2: Convert to fraction form
    112,980.85/155,927.41 = 65,234.09/x
  3. Step 3: Cross multiply
    112,980.85x = 155,927.41 × 65,234.09
  4. Step 4: Simplify right side
    112,980.85x = 10,171,782,924.14
  5. Step 5: Solve for x
    x = 10,171,782,924.14/112,980.85
  6. Step 6: Final answer
    x = 90,031.04

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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.