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Finding the Fourth Proportional to 65,540.72, 90,447.48 and 35,732.72

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Solution

The fourth proportional to 65,540.72, 90,447.48 and 35,732.72 is: 49,311.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,540.72 : 90,447.48 = 35,732.72 : x
  2. Step 2: Convert to fraction form
    65,540.72/90,447.48 = 35,732.72/x
  3. Step 3: Cross multiply
    65,540.72x = 90,447.48 × 35,732.72
  4. Step 4: Simplify right side
    65,540.72x = 3,231,934,477.55
  5. Step 5: Solve for x
    x = 3,231,934,477.55/65,540.72
  6. Step 6: Final answer
    x = 49,311.85

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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.