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Finding the Fourth Proportional to 258,671.58, 388,065.74 and 78,773.09

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Solution

The fourth proportional to 258,671.58, 388,065.74 and 78,773.09 is: 118,177.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,671.58 : 388,065.74 = 78,773.09 : x
  2. Step 2: Convert to fraction form
    258,671.58/388,065.74 = 78,773.09/x
  3. Step 3: Cross multiply
    258,671.58x = 388,065.74 × 78,773.09
  4. Step 4: Simplify right side
    258,671.58x = 30,569,135,128.74
  5. Step 5: Solve for x
    x = 30,569,135,128.74/258,671.58
  6. Step 6: Final answer
    x = 118,177.40

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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.