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Finding the Fourth Proportional to 90,609.62, 135,879.81 and 29,805.75

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Solution

The fourth proportional to 90,609.62, 135,879.81 and 29,805.75 is: 44,697.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,609.62 : 135,879.81 = 29,805.75 : x
  2. Step 2: Convert to fraction form
    90,609.62/135,879.81 = 29,805.75/x
  3. Step 3: Cross multiply
    90,609.62x = 135,879.81 × 29,805.75
  4. Step 4: Simplify right side
    90,609.62x = 4,049,999,702.79
  5. Step 5: Solve for x
    x = 4,049,999,702.79/90,609.62
  6. Step 6: Final answer
    x = 44,697.24

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1.5x scale

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.