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Finding the Fourth Proportional to 72,900.03, 100,620.81 and 47,469.87

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Solution

The fourth proportional to 72,900.03, 100,620.81 and 47,469.87 is: 65,520.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,900.03 : 100,620.81 = 47,469.87 : x
  2. Step 2: Convert to fraction form
    72,900.03/100,620.81 = 47,469.87/x
  3. Step 3: Cross multiply
    72,900.03x = 100,620.81 × 47,469.87
  4. Step 4: Simplify right side
    72,900.03x = 4,776,456,769.99
  5. Step 5: Solve for x
    x = 4,776,456,769.99/72,900.03
  6. Step 6: Final answer
    x = 65,520.64

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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.