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Finding the Fourth Proportional to 65,339.63, 90,185.09 and 38,472.33

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Solution

The fourth proportional to 65,339.63, 90,185.09 and 38,472.33 is: 53,101.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,339.63 : 90,185.09 = 38,472.33 : x
  2. Step 2: Convert to fraction form
    65,339.63/90,185.09 = 38,472.33/x
  3. Step 3: Cross multiply
    65,339.63x = 90,185.09 × 38,472.33
  4. Step 4: Simplify right side
    65,339.63x = 3,469,630,351.20
  5. Step 5: Solve for x
    x = 3,469,630,351.20/65,339.63
  6. Step 6: Final answer
    x = 53,101.47

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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.