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Finding the Fourth Proportional to 65,496.48, 90,396.08 and 38,645.64

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Solution

The fourth proportional to 65,496.48, 90,396.08 and 38,645.64 is: 53,337.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,496.48 : 90,396.08 = 38,645.64 : x
  2. Step 2: Convert to fraction form
    65,496.48/90,396.08 = 38,645.64/x
  3. Step 3: Cross multiply
    65,496.48x = 90,396.08 × 38,645.64
  4. Step 4: Simplify right side
    65,496.48x = 3,493,414,365.09
  5. Step 5: Solve for x
    x = 3,493,414,365.09/65,496.48
  6. Step 6: Final answer
    x = 53,337.44

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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.