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Finding the Fourth Proportional to 65,221.56, 90,004.50 and 38,367

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Solution

The fourth proportional to 65,221.56, 90,004.50 and 38,367 is: 52,945.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,221.56 : 90,004.50 = 38,367 : x
  2. Step 2: Convert to fraction form
    65,221.56/90,004.50 = 38,367/x
  3. Step 3: Cross multiply
    65,221.56x = 90,004.50 × 38,367
  4. Step 4: Simplify right side
    65,221.56x = 3,453,202,651.50
  5. Step 5: Solve for x
    x = 3,453,202,651.50/65,221.56
  6. Step 6: Final answer
    x = 52,945.72

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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.