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Finding the Fourth Proportional to 258,863,613.50, 388,349,954.02 and 83,972,991.58

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Solution

The fourth proportional to 258,863,613.50, 388,349,954.02 and 83,972,991.58 is: 125,977,177.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,863,613.50 : 388,349,954.02 = 83,972,991.58 : x
  2. Step 2: Convert to fraction form
    258,863,613.50/388,349,954.02 = 83,972,991.58/x
  3. Step 3: Cross multiply
    258,863,613.50x = 388,349,954.02 × 83,972,991.58
  4. Step 4: Simplify right side
    258,863,613.50x = 32,610,907,419,014,844
  5. Step 5: Solve for x
    x = 32,610,907,419,014,844/258,863,613.50
  6. Step 6: Final answer
    x = 125,977,177.63

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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.