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Finding the Fourth Proportional to 72,407,736.80, 108,737,576.40 and 38,395,512.80

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Solution

The fourth proportional to 72,407,736.80, 108,737,576.40 and 38,395,512.80 is: 57,660,067.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,407,736.80 : 108,737,576.40 = 38,395,512.80 : x
  2. Step 2: Convert to fraction form
    72,407,736.80/108,737,576.40 = 38,395,512.80/x
  3. Step 3: Cross multiply
    72,407,736.80x = 108,737,576.40 × 38,395,512.80
  4. Step 4: Simplify right side
    72,407,736.80x = 4,175,035,006,507,178
  5. Step 5: Solve for x
    x = 4,175,035,006,507,178/72,407,736.80
  6. Step 6: Final answer
    x = 57,660,067.71

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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.