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Finding the Fourth Proportional to 72,930.05, 100,662.19 and 47,499.78

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Solution

The fourth proportional to 72,930.05, 100,662.19 and 47,499.78 is: 65,561.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,930.05 : 100,662.19 = 47,499.78 : x
  2. Step 2: Convert to fraction form
    72,930.05/100,662.19 = 47,499.78/x
  3. Step 3: Cross multiply
    72,930.05x = 100,662.19 × 47,499.78
  4. Step 4: Simplify right side
    72,930.05x = 4,781,431,760.57
  5. Step 5: Solve for x
    x = 4,781,431,760.57/72,930.05
  6. Step 6: Final answer
    x = 65,561.89

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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.