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Finding the Fourth Proportional to 118,805.98, 177,716.48 and 90,511.96

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Solution

The fourth proportional to 118,805.98, 177,716.48 and 90,511.96 is: 135,392.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,805.98 : 177,716.48 = 90,511.96 : x
  2. Step 2: Convert to fraction form
    118,805.98/177,716.48 = 90,511.96/x
  3. Step 3: Cross multiply
    118,805.98x = 177,716.48 × 90,511.96
  4. Step 4: Simplify right side
    118,805.98x = 16,085,466,929.10
  5. Step 5: Solve for x
    x = 16,085,466,929.10/118,805.98
  6. Step 6: Final answer
    x = 135,392.74

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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.