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Finding the Fourth Proportional to 65,590.72, 90,495.84 and 38,735.44

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Solution

The fourth proportional to 65,590.72, 90,495.84 and 38,735.44 is: 53,443.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,590.72 : 90,495.84 = 38,735.44 : x
  2. Step 2: Convert to fraction form
    65,590.72/90,495.84 = 38,735.44/x
  3. Step 3: Cross multiply
    65,590.72x = 90,495.84 × 38,735.44
  4. Step 4: Simplify right side
    65,590.72x = 3,505,396,180.57
  5. Step 5: Solve for x
    x = 3,505,396,180.57/65,590.72
  6. Step 6: Final answer
    x = 53,443.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.