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Finding the Fourth Proportional to 291,841.82, 437,729.91 and 78,625.49

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Solution

The fourth proportional to 291,841.82, 437,729.91 and 78,625.49 is: 117,929.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,841.82 : 437,729.91 = 78,625.49 : x
  2. Step 2: Convert to fraction form
    291,841.82/437,729.91 = 78,625.49/x
  3. Step 3: Cross multiply
    291,841.82x = 437,729.91 × 78,625.49
  4. Step 4: Simplify right side
    291,841.82x = 34,416,728,661.41
  5. Step 5: Solve for x
    x = 34,416,728,661.41/291,841.82
  6. Step 6: Final answer
    x = 117,929.39

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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.