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Finding the Fourth Proportional to 89,128.75, 133,690.39 and 36,498.60

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Solution

The fourth proportional to 89,128.75, 133,690.39 and 36,498.60 is: 54,746.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,128.75 : 133,690.39 = 36,498.60 : x
  2. Step 2: Convert to fraction form
    89,128.75/133,690.39 = 36,498.60/x
  3. Step 3: Cross multiply
    89,128.75x = 133,690.39 × 36,498.60
  4. Step 4: Simplify right side
    89,128.75x = 4,879,511,400.00
  5. Step 5: Solve for x
    x = 4,879,511,400.00/89,128.75
  6. Step 6: Final answer
    x = 54,746.77

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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.