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Finding the Fourth Proportional to 65,469.60, 90,359.82 and 38,610.54

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Solution

The fourth proportional to 65,469.60, 90,359.82 and 38,610.54 is: 53,289.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,469.60 : 90,359.82 = 38,610.54 : x
  2. Step 2: Convert to fraction form
    65,469.60/90,359.82 = 38,610.54/x
  3. Step 3: Cross multiply
    65,469.60x = 90,359.82 × 38,610.54
  4. Step 4: Simplify right side
    65,469.60x = 3,488,841,444.50
  5. Step 5: Solve for x
    x = 3,488,841,444.50/65,469.60
  6. Step 6: Final answer
    x = 53,289.49

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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.