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Finding the Fourth Proportional to 258,877.58, 388,157.81 and 100,921.50

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Solution

The fourth proportional to 258,877.58, 388,157.81 and 100,921.50 is: 151,320.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,877.58 : 388,157.81 = 100,921.50 : x
  2. Step 2: Convert to fraction form
    258,877.58/388,157.81 = 100,921.50/x
  3. Step 3: Cross multiply
    258,877.58x = 388,157.81 × 100,921.50
  4. Step 4: Simplify right side
    258,877.58x = 39,173,467,917.31
  5. Step 5: Solve for x
    x = 39,173,467,917.31/258,877.58
  6. Step 6: Final answer
    x = 151,320.44

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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.