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Finding the Fourth Proportional to 72,740.81, 100,348.42 and 47,245.37

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Solution

The fourth proportional to 72,740.81, 100,348.42 and 47,245.37 is: 65,176.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,740.81 : 100,348.42 = 47,245.37 : x
  2. Step 2: Convert to fraction form
    72,740.81/100,348.42 = 47,245.37/x
  3. Step 3: Cross multiply
    72,740.81x = 100,348.42 × 47,245.37
  4. Step 4: Simplify right side
    72,740.81x = 4,740,998,231.82
  5. Step 5: Solve for x
    x = 4,740,998,231.82/72,740.81
  6. Step 6: Final answer
    x = 65,176.59

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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.