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Finding the Fourth Proportional to 72,992.47, 100,729.33 and 39,458.47

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Solution

The fourth proportional to 72,992.47, 100,729.33 and 39,458.47 is: 54,452.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,992.47 : 100,729.33 = 39,458.47 : x
  2. Step 2: Convert to fraction form
    72,992.47/100,729.33 = 39,458.47/x
  3. Step 3: Cross multiply
    72,992.47x = 100,729.33 × 39,458.47
  4. Step 4: Simplify right side
    72,992.47x = 3,974,625,245.93
  5. Step 5: Solve for x
    x = 3,974,625,245.93/72,992.47
  6. Step 6: Final answer
    x = 54,452.54

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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.