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Finding the Fourth Proportional to 140,375.88, 210,709.62 and 81,326.88

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Solution

The fourth proportional to 140,375.88, 210,709.62 and 81,326.88 is: 122,074.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,375.88 : 210,709.62 = 81,326.88 : x
  2. Step 2: Convert to fraction form
    140,375.88/210,709.62 = 81,326.88/x
  3. Step 3: Cross multiply
    140,375.88x = 210,709.62 × 81,326.88
  4. Step 4: Simplify right side
    140,375.88x = 17,136,355,980.59
  5. Step 5: Solve for x
    x = 17,136,355,980.59/140,375.88
  6. Step 6: Final answer
    x = 122,074.79

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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.