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Finding the Fourth Proportional to 141,449.48, 211,980.99 and 78,175.88

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Solution

The fourth proportional to 141,449.48, 211,980.99 and 78,175.88 is: 117,157.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,449.48 : 211,980.99 = 78,175.88 : x
  2. Step 2: Convert to fraction form
    141,449.48/211,980.99 = 78,175.88/x
  3. Step 3: Cross multiply
    141,449.48x = 211,980.99 × 78,175.88
  4. Step 4: Simplify right side
    141,449.48x = 16,571,800,436.52
  5. Step 5: Solve for x
    x = 16,571,800,436.52/141,449.48
  6. Step 6: Final answer
    x = 117,157.03

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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.