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Finding the Fourth Proportional to 72,543,574.80, 108,673,644.60 and 43,704,043.20

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Solution

The fourth proportional to 72,543,574.80, 108,673,644.60 and 43,704,043.20 is: 65,470,686.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,543,574.80 : 108,673,644.60 = 43,704,043.20 : x
  2. Step 2: Convert to fraction form
    72,543,574.80/108,673,644.60 = 43,704,043.20/x
  3. Step 3: Cross multiply
    72,543,574.80x = 108,673,644.60 × 43,704,043.20
  4. Step 4: Simplify right side
    72,543,574.80x = 4,749,477,658,299,847
  5. Step 5: Solve for x
    x = 4,749,477,658,299,847/72,543,574.80
  6. Step 6: Final answer
    x = 65,470,686.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.